Pontiac V8 engine

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==Overview==

A look at one of the more popular GM engines.

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{{warning}}Be sure to verify Pontiac info found in print, by word of mouth or on the internet... and even here. There is a lot of erroneous and misleading info being circulated, even from so-called experts, pros and gurus.

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'''Remember''': ''Trust but verify!''

==Pontiac engine history==

*[http://www.pontiacsafari.com/L1EarlyV8Pontiacs/V8%20Engines/index.html Pontiac V-8 Engines] by Larry Gorden, 2007; updated April 2009

*[http://en.wikipedia.org/wiki/Pontiac_V8_engine Pontiac V8 engine] Wiki article

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==Pontiac engines by year==

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'''NOTES:'''

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'''*'''The 1963 "326" engine had an actual displacement of 336 ~~cid~~.

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'''*'''The 1963 "326" engine had an actual displacement of 336 ci due to its 3.78" bore.

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'''**''' The 303 and 366 were not productions engines.

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'''**''' The 303 and 366 were not productions engines.

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'''***'''The 350 engine actually displaced 354 ci.

==Pontiac engines by displacement==

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</table>

'''NOTES:'''

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'''*'''The 1963 "326" engine had an actual displacement of 336 ~~cid~~.

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'''*'''The 1963 "326" engine had an actual displacement of 336 ci due to its 3.78" bore.

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'''**''' The 303 and 366 were not productions engines.

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'''**''' The 303 and 366 were not productions engines.

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'''***'''The 350 engine actually displaced 354 ci.

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'''NOTES:'''

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'''*'''The 1963 "326" engine had an actual displacement of 336 ~~cid~~.

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'''*'''The 1963 "326" engine had an actual displacement of 336 ci due to its 3.78" bore.

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'''**''' The 303 and 366 were not productions engines.

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'''**''' The 303 and 366 were not productions engines.

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'''***'''The 350 engine actually displaced 354 ci.

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<td align="center">Pressed-in*</td>

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<td align="center">400 4-bbl Manual</td>

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<td align="center">Pressed-in*</td>

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<td colspan="4" align="center~~" tr bgcolor="#FFF8DC~~">*All rocker arms studs are threaded beginning with unit number 709986, assembled on or about May 7, 1973 </td>

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<td colspan="4" align="center">*All rocker arms studs are threaded beginning with unit number 709986, assembled on or about May 7, 1973 </td>

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===~~Head~~ code identifiers===

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===Secondary head code identifiers===

====1973-'74 4X, 46, 4C, 16/X====

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<th align="center">Valve Length (in.)</th>

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~~<td align~~="~~center~~"~~>5H </td><td align="center">4C (AIR)</td><td align="center">96.17</td><td align="center">1.96/1.66</td><td align="center">4.86</td><td align="center">350</td>~~

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====1975 (early) 5C, 51====

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~~<td colspan="6" align="center" bgcolor="#FFF8DC">*All rocker arm studs are threaded beginning with unit number 709986, assembled on or about May 7, 1973 </td>~~

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====1975 (early) 5C, 51~~, 5I~~====

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<th align="~~center~~">Stamped ID</th>

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<th align="top">Stamped ID</th>

<th align="center">Chamber Volume (cc)</th>

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<th align="center">Valve Length (in.)</th>

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<th align="center">Valve Length (in.)</th>

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===Valve sizes===

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===Original head applications===

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<table border="1" cellpadding="1" ><tr><td colspan="5" align="center" bgcolor="#DDDFFF">CYLINDER HEAD APPLICATIONS </td></tr><tr><td bgcolor="#FFF8DC">Casting</td><td bgcolor="#FFF8DC">Secondary ID</td><td bgcolor="#FFF8DC">Valve diameter (in.)</td><td bgcolor="#FFF8DC">Chamber volume</td><td bgcolor="#FFF8DC">Original application</td></tr><tr><td>4X</td><td>1/1H</td><td>2.11/1.66</td><td>112 cc</td><td>1973-'74 455ci 4-bbl</td></tr><tr><td>4X</td><td>3/3H</td><td>2.11/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 4-bbl manual trans.</td></tr><tr><td>4X</td><td>4/4H</td><td>1.96/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 2-bbl</td></tr><tr><td>4X</td><td>7/7H</td><td>2.11/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 4-bbl auto trans.</td></tr><tr><td>4C</td><td>5/5H</td><td>1.96/1.66</td><td>96 cc</td><td>1973-'74 350ci 2-bbl w/A.I.R.</td></tr><tr><td>4C</td><td>8/8H</td><td>1.96/1.66</td><td>98 cc</td><td>1973-'74 400ci 2-bbl w/A.I.R.</td></tr><tr><td>46</td><td>6/6H'''*'''</td><td>1.96/1.66</td><td>96 cc</td><td>1973-'74 350ci</td></tr><tr><td>5C</td><td>4</td><td>2.11/1.66</td><td>92-94 cc</td><td>1975 350ci</td></tr><tr><td>5C</td><td>7</td><td>2.11/1.66</td><td>99-101 cc</td><td>1975 400ci w/A.I.R.</td></tr><tr><td>5C</td><td>8</td><td>2.11/1.66</td><td>99-101 cc</td><td>1975 400ci</td></tr><tr><td>5C</td><td>9</td><td>2.11/1.66</td><td>92-94 cc</td><td>1975 350ci w/A.I.R.</td></tr><tr><td>6X</td><td>4</td><td>2.11/1.66</td><td>92-94 cc</td><td>Mid 1975-'77 350ci; 1977-'79 W72 400ci</td></tr><tr><td>6X</td><td>8</td><td>2.11/1.66</td><td>99-101 cc</td><td>Mid 1975-'78 400ci</td></tr><tr><td>6S</td><td>7</td><td>2.11/1.66</td><td>99-101 cc</td><td>Mid 1975-'76 400ci w/A.I.R.</td></tr><tr><td>6S</td><td>9</td><td>2.11/1.66</td><td>92-94 cc</td><td>Mid 1975-'76 350ci w/A.I.R.</td></tr><tr><td>51</td><td>6</td><td>2.11/1.66</td><td>124.5 cc</td><td>1975 455ci</td></tr><tr><td>6H</td><td>6</td><td>2.11/1.66</td><td>124.5 cc</td><td>Late 1975-'76 455ci</td></tr><tr><td ~~bgcolor="#FFF8DC"~~ colspan="5">'''*'''Some ~~have been~~ reported to have a secondary stamp of "2"</td></tr></table>

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<table border="1" cellpadding="2" cellspacing="0"><tr><td colspan="5" align="center" bgcolor="#DDDFFF">CYLINDER HEAD APPLICATIONS </td></tr><tr><td bgcolor="#FFF8DC">Casting</td><td bgcolor="#FFF8DC">Secondary ID</td><td bgcolor="#FFF8DC">Valve diameter (in.)</td><td bgcolor="#FFF8DC">Chamber volume</td><td bgcolor="#FFF8DC">Original application</td></tr><tr bgcolor="#F1F1F1"><td>4X</td><td>1/1H</td><td>2.11/1.66</td><td>112 cc</td><td>1973-'74 455ci 4-bbl</td></tr><tr><td>4X</td><td>3/3H</td><td>2.11/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 4-bbl manual trans.</td></tr><tr bgcolor="#F1F1F1"><td>4X</td><td>4/4H</td><td>1.96/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 2-bbl</td></tr><tr><td>4X</td><td>7/7H</td><td>2.11/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 4-bbl auto trans.</td></tr><tr bgcolor="#F1F1F1"><td>4C</td><td>5/5H</td><td>1.96/1.66</td><td>96 cc</td><td>1973-'74 350ci 2-bbl w/A.I.R.</td></tr><tr><td>4C</td><td>8/8H</td><td>1.96/1.66</td><td>98 cc</td><td>1973-'74 400ci 2-bbl w/A.I.R.</td></tr><tr bgcolor="#F1F1F1"><td>46</td><td>6/6H'''*'''</td><td>1.96/1.66</td><td>96 cc</td><td>1973-'74 350ci</td></tr><tr><td>5C</td><td>4</td><td>2.11/1.66</td><td>92-94 cc</td><td>1975 350ci</td></tr><tr bgcolor="#F1F1F1"><td>5C</td><td>7</td><td>2.11/1.66</td><td>99-101 cc</td><td>1975 400ci w/A.I.R.</td></tr><tr><td>5C</td><td>8</td><td>2.11/1.66</td><td>99-101 cc</td><td>1975 400ci</td></tr><tr bgcolor="#F1F1F1"><td>5C</td><td>9</td><td>2.11/1.66</td><td>92-94 cc</td><td>1975 350ci w/A.I.R.</td></tr><tr><td>6X</td><td>4</td><td>2.11/1.66</td><td>92-94 cc</td><td>Mid 1975-'77 350ci; 1977-'79 W72 400ci</td></tr><tr bgcolor="#F1F1F1"><td>6X</td><td>8</td><td>2.11/1.66</td><td>99-101 cc</td><td>Mid 1975-'78 400ci</td></tr><tr><td>6S</td><td>7</td><td>2.11/1.66</td><td>99-101 cc</td><td>Mid 1975-'76 400ci w/A.I.R.</td></tr><tr bgcolor="#F1F1F1"><td>6S</td><td>9</td><td>2.11/1.66</td><td>92-94 cc</td><td>Mid 1975-'76 350ci w/A.I.R.</td></tr><tr><td>51</td><td>6</td><td>2.11/1.66</td><td>124.5 cc</td><td>1975 455ci</td></tr><tr bgcolor="#F1F1F1"><td>6H</td><td>6</td><td>2.11/1.66</td><td>124.5 cc</td><td>Late 1975-'76 455ci</td></tr><tr><td colspan="5">'''*'''Some reported to have a secondary stamp of "'''2'''"</td></tr></table>

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==Parts interchangeability==

Based on info from teufert.net and Ken's Speed & Machine.

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<td bgcolor="#DDDFFF">INTERCHANGE YEARS: </td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Block:</td>

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<tr valign="center" align="middle"><td >Block:</td>

<td >1955,1956,1957,1959-'60,1961-'64 (full size V8), 1964-'69 (Tempest/Grand Prix V8), 1970-'79 '''Note:''' No block mount starter holes on pre-1964 blocks</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Bellhousing:</td>

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<tr bgcolor="#F1F1F1" valign="center" align="middle"><td >Bellhousing:</td>

<td >1955, 1956-'57, 1958-'60, 1961-'64 (fullsize), 1964-'79 (all except 1964 fullsize)</td></tr>

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<td >1955-'58, 1959-'79; all use the same oil pump shaft</td></tr>

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<td >1955-'58, 1959-'60, 1961-'63, 1964, 1965-'71, 1972-'79 '''Note:''' Same pan can be used from 1964-on with proper rear pan seal</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Windage tray:</td>

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<tr valign="center" align="middle"><td >Windage tray:</td>

<td >1955-'58, 1959-'60, 1961-'62, 1963, 1964, 1965-'72 '''Note:''' After 1972 some blocks have no provision for windage tray mounting. #2 and #4 main cap holes are for windage tray mounting. Center main cap holes (#3 cap) for lower dipstick mounting only</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Oil filter:</td>

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<tr bgcolor="#F1F1F1" valign="center" align="middle"><td >Oil filter:</td>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Oil filter mount:</td>

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<tr valign="center" align="middle"><td >Oil filter mount:</td>

<td >1955-'59, 1960-'62, 1963, 1964-'70 (straight), 1967-'79 (tilted) '''Note:''' There are basically two different oil filter housings: Pre-1970 straight mount and the later angled housing mount. Also special adapter for a rearward facing oil filter housing to clear RA III and IV exhaust</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Crankshaft:</td>

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<tr bgcolor="#F1F1F1" valign="center" align="middle"><td >Crankshaft:</td>

<td >1955-'56, 1957-'58, 1959-'66 (3" main), 1967-'78 (3" main), 1962-'76 (3.25" main). For all engines after 1964: 326, 350, 389 and 400 use the 3" mains. 421, 428 and 455 use the 3.25" mains. More at [[Pontiac V8 engine #Cranks|Cranks]]</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Harmonic balancer:</td>

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<tr valign="center" align="middle"><td >Harmonic balancer:</td>

<td >1955-'62, 1963, 1964, 1965, 1966, 1967, 1968-'79 '''Note:''' Some 1977-up 400 and 301 use a crankshaft hub without a rubber torsional ring</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Flywheel:</td>

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<tr bgcolor="#F1F1F1" valign="center" align="middle"><td >Flywheel:</td>

<td >1955-'57, 1958-'60, 1961-'62, 1963, 1964-'79 '''Note:''' There are two different diameter flanges used on the 400 crank after 1975: 2-1/2" and 2-3/4". All 350/389/400/428 and 455 with same flange will interchange. Also watch the pilot ID on early pre-1964 389 Armasteel cranks when using an automatic</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Connecting rods:</td>

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<tr valign="center" align="middle"><td >Connecting rods:</td>

<td >1955-'79 '''Note:''' Before 1962 forged rods were installed, but weaker then the later cast rod unless heat treated and prepped. Swapping to the earlier lighter forged rod requires re-balancing More at [[Pontiac V8 engine#Rods|Rods]]</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Pistons:</td>

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<tr bgcolor="#F1F1F1" valign="center" align="middle"><td >Pistons:</td>

<td >Must match the bore, stroke, and head series '''Note:''' 455 SD piston use SD rod unless the pin boss is internally milled. More at [[Pontiac V8 engine #Pistons|Pistons]] </td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Wrist pins:</td>

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<tr valign="center" align="middle"><td >Wrist pins:</td>

<td >1955-'57, 1958-'62, 1963-'65, 1966-'79 Some SD pins are longer</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Heads:</td>

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<tr bgcolor="#F1F1F1" valign="center" align="middle"><td >Heads:</td>

<td >1955, 1956-'60, 1961-'66, 1967-'79 '''Note:''' Valve centers were widened in 1967 for larger valve diameters. More at [[Pontiac V8 engine #Heads|Heads]]</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Rocker arm:</td>

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<tr valign="center" align="middle"><td >Rocker arm:</td>

<td >1955, 1956-'60, 1961-'64, 1963 (421 HO)-'64 (GTO Tripower), 1965, 1966, 1967 (326 only), 1967-'79 '''Note:''' Ram Air IV engines used a 1.65 ratio, the pushrod holes were factory enlarged for this. All other heads have to be modified to use 1.65 rocker arms</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Pushrods:</td>

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<tr bgcolor="#F1F1F1" valign="center" align="middle"><td >Pushrods:</td>

<td >1955-'60, 1961-'66, 1967-'76 (except longer Ram Air IV) '''Note:''' Match pushrod to year of head</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Valve covers:</td>

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<tr valign="center" align="middle"><td >Valve covers:</td>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Lifters:</td>

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<tr bgcolor="#F1F1F1" valign="center" align="middle"><td >Lifters:</td>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Camshaft:</td>

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<tr valign="center" align="middle"><td >Camshaft:</td>

<td >1955-'79 (except Ram Air V/455 Super Duty). More at [[Pontiac V8 engine #Cams|Cams]]</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Intake manifold:</td>

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<tr bgcolor="#F1F1F1" valign="center" align="middle"><td >Intake manifold:</td>

<td >1955, 1956, 1957-'58, 1959-'60, 1961-'62, 1963-'64, 1965-'71, 1972-'79 More at [[Pontiac V8 engine #Intakes|Intakes]] and [[Pontiac V8 engine #Heat cross over|Heat cross over]] </td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Exhaust manifolds:</td>

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<tr valign="center" align="middle"><td >Exhaust manifolds:</td>

<td >1955, 1956, 1957, 1958, 1959-'79 (D-port); 1968-'74 (round port)</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Distributor:</td>

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<tr bgcolor="#F1F1F1" valign="center" align="middle"><td >Distributor:</td>

<td >1955-'79 (except Ram Air V/455 Super Duty)</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Starter:</td>

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<tr valign="center" align="middle"><td >Starter:</td>

<td >1955, 1956-'60, 1961-'64 (fullsize), 1964 (Tempest/Grand Prix)-'79</td></tr>

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<tr valign="center" align="middle"><td ~~bgcolor="#FFF8DC"~~>Timing Cover:</td>

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<tr bgcolor="#F1F1F1" valign="center" align="middle"><td >Timing Cover:</td>

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<td >1955-'59, 1960, 1961-'62 (inc. Tempest "Trophy" 4), 1963, 1963 1/2-'65, 1966-'67, 1968, 1969-'79 The only difference in the 1968-up timing covers are the timing ~~indictor~~ markings. Some late model 400 and 301 covers have a plastic bolt on tab. More at [[Pontiac V8 engine #Timing covers|Timing covers]]</td></tr>

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<td >1955-'59, 1960, 1961-'62 (inc. Tempest "Trophy" 4), 1963, 1963 1/2-'65, 1966-'67, 1968, 1969-'79 The only difference in the 1968-up timing covers are the timing indicator markings. Some late model 400 and 301 covers have a plastic bolt on tab. More at [[Pontiac V8 engine #Timing covers|Timing covers]]</td></tr>

</table>

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;Hotrodders Knowledge Base

*[http://www.hotrodders.com/kb/pontiac-engines Pontiac engines]

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~~==Caution==~~

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{{warning|Be sure to verify '''''all''''' Pontiac info found in print, by word of mouth, or on the internet (including here). There's a LOT of erroneous and misleading info out there, even from so-called experts, pros and gurus.}}

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[[Category:Engine]]

Pontiac V8 engine

Revision as of 13:51, 8 March 2013

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@@ Line 2: / Line 2: @@
 ==Overview==
 A look at one of the more popular GM engines.
+{{warning}}Be sure to verify Pontiac info found in print, by word of mouth or on the internet... and even here. There is a lot of erroneous and misleading info being circulated, even from so-called experts, pros and gurus.
+'''Remember''': ''Trust but verify!''
 ==Pontiac engine history==
 *[http://www.pontiacsafari.com/L1EarlyV8Pontiacs/V8%20Engines/index.html Pontiac V-8 Engines] by Larry Gorden, 2007; updated April 2009
 *[http://en.wikipedia.org/wiki/Pontiac_V8_engine Pontiac V8 engine] Wiki article
 ==Pontiac engines by year==
@@ Line 24: / Line 27: @@
 <td style="width: 49px">2.50</td>
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+<tr bgcolor="#F1F1F1">
 <td style="width: 81px">'''1956'''</td>
 <td style="width: 48px">316</td>
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 <td style="width: 49px">2.623</td>
 <td style="width: 53px">2.25</td></tr>
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+<tr bgcolor="#F1F1F1">
 <td style="width: 81px">'''1958'''</td>
 <td style="width: 48px">370</td>
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 <td style="width: 49px">3.00</td>
 <td style="width: 53px">2.25</td></tr>
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+<tr bgcolor="#F1F1F1">
 <td style="width: 81px">'''1961-'66'''</td>
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 <td style="width: 49px">3.00</td>
 <td style="width: 53px">2.25</td></tr>
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 <td style="width: 81px">'''1967-'69'''</td>
 <td style="width: 48px">428</td>
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 <td style="width: 49px">3.00</td>
 <td style="width: 53px">2.25</td></tr>
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 <td style="width: 81px">'''1968-'77'''</td>
-<td style="width: 48px">350</td>
+<td style="width: 48px">350'''***'''</td>
 <td style="width: 54px">3.875</td>
 <td style="width: 60px">3.75</td>
@@ Line 94: / Line 97: @@
 <td style="width: 49px">3.00</td>
 <td style="width: 53px">2.25</td></tr>
-<tr>
+<tr bgcolor="#F1F1F1">
 <td style="width: 81px">'''1970'''</td>
 <td style="width: 48px">366'''**'''</td>
@@ Line 108: / Line 111: @@
 <td style="width: 49px">3.25</td>
 <td style="width: 53px">2.25</td></tr>
-<tr>
+<tr bgcolor="#F1F1F1">
 <td style="width: 81px">'''1977-'81'''</td>
 <td style="width: 48px">301</td>
@@ Line 124: / Line 127: @@
 </table>
 '''NOTES:'''<br>
-'''*'''The 1963 "326" engine had an actual displacement of 336 cid.<br>
+'''*'''The 1963 "326" engine had an actual displacement of 336 ci due to its 3.78" bore.<br>
-'''**''' The 303 and 366 were not productions engines.
+'''**''' The 303 and 366 were not productions engines.<br>
+'''***'''The 350 engine actually displaced 354 ci.
 <br>
 ==Pontiac engines by displacement==
@@ Line 143: / Line 147: @@
 <td style="width: 46px">3.00</td>
 <td style="width: 26px">2.25</td></tr>
-<tr>
+<tr bgcolor="#F1F1F1">
 <td style="width: 38px">'''287'''</td>
 <td style="width: 62px">1955</td>
@@ Line 157: / Line 161: @@
 <td style="width: 46px">3.00</td>
 <td style="width: 26px">2.25</td></tr>
-<tr>
+<tr bgcolor="#F1F1F1">
 <td style="width: 38px">'''303**'''</td>
 <td style="width: 62px">1969</td>
@@ Line 171: / Line 175: @@
 <td style="width: 46px">2.50</td>
 <td style="width: 26px">2.25</td></tr>
-<tr>
+<tr bgcolor="#F1F1F1">
-<td style="width: 38px">'''326'''<span class="style135"><strong>*</strong></span></td>
+<td style="width: 38px">'''326*'''</td>
 <td style="width: 62px">1963-'67</td>
 <td>3.71875</td>
@@ Line 185: / Line 189: @@
 <td style="width: 46px">2.623</td>
 <td style="width: 26px">2.25</td></tr>
-<tr>
+<tr bgcolor="#F1F1F1">
-<td style="width: 38px">'''350'''</td>
+<td style="width: 38px">'''350***'''</td>
 <td style="width: 62px">1968-'77</td>
 <td>3.875</td>
@@ Line 199: / Line 203: @@
 <td style="width: 46px">3.00</td>
 <td style="width: 26px">2.25</td></tr>
-<tr>
+<tr bgcolor="#F1F1F1">
 <td style="width: 38px">'''370'''</td>
 <td style="width: 62px">1958</td>
@@ Line 213: / Line 217: @@
 <td style="width: 46px">3.00</td>
 <td style="width: 26px">2.25</td></tr>
-<tr>
+<tr bgcolor="#F1F1F1">
 <td style="width: 38px">'''400'''</td>
 <td style="width: 62px">1967-'79</td>
@@ Line 227: / Line 231: @@
 <td style="width: 46px">3.25</td>
 <td style="width: 26px">2.25</td></tr>
-<tr>
+<tr bgcolor="#F1F1F1">
 <td style="width: 38px">'''428'''</td>
 <td style="width: 62px">1967-'69</td>
@@ Line 243: / Line 247: @@
 </table>
 '''NOTES:'''<br>
-'''*'''The 1963 "326" engine had an actual displacement of 336 cid.<br>
+'''*'''The 1963 "326" engine had an actual displacement of 336 ci due to its 3.78" bore.<br>
-'''**''' The 303 and 366 were not productions engines.
+'''**''' The 303 and 366 were not productions engines.<br>
+'''***'''The 350 engine actually displaced 354 ci.
 <br>
@@ Line 279: / Line 284: @@
      <td >3.00</td>
      <td >2.25</td></tr>
-   <tr align="center" valign="bottom">
+   <tr bgcolor="#F1F1F1" align="center" valign="bottom">
      <td>'''287'''</td>
      <td >3.75</td>
@@ Line 291: / Line 296: @@
      <td >3.00</td>
      <td >2.25</td></tr>
-   <tr align="center" valign="bottom">
+   <tr bgcolor="#F1F1F1" align="center" valign="bottom">
      <td>'''303**'''</td>
      <td >4.125</td>
@@ Line 303: / Line 308: @@
      <td >2.50</td>
      <td >2.25</td></tr>
-   <tr align="center" valign="bottom">
+   <tr bgcolor="#F1F1F1" align="center" valign="bottom">
      <td>'''326*'''</td>
      <td >3.71875</td>
@@ Line 315: / Line 320: @@
      <td >2.623</td>
      <td >2.25</td></tr>
-   <tr align="center" valign="bottom">
+   <tr bgcolor="#F1F1F1" align="center" valign="bottom">
-     <td>'''350'''</td>
+     <td>'''350***'''</td>
      <td >3.875</td>
      <td >3.75</td>
@@ Line 327: / Line 332: @@
      <td >3.00</td>
      <td >2.25</td></tr>
-   <tr align="center" valign="bottom">
+   <tr bgcolor="#F1F1F1" align="center" valign="bottom">
      <td>'''370'''</td>
      <td >4.0625</td>
@@ Line 339: / Line 344: @@
      <td >3.00</td>
      <td >2.25</td></tr>
-   <tr align="center" valign="bottom">
+   <tr bgcolor="#F1F1F1" align="center" valign="bottom">
      <td>'''400'''</td>
      <td >4.12</td>
@@ Line 351: / Line 356: @@
      <td >3.25</td>
      <td >2.25</td></tr>
-   <tr align="center" valign="bottom">
+   <tr bgcolor="#F1F1F1" align="center" valign="bottom">
      <td>'''428'''</td>
      <td >4.12</td>
@@ Line 364: / Line 369: @@
      <td >2.25</td></tr></table>
 '''NOTES:'''<br>
-'''*'''The 1963 "326" engine had an actual displacement of 336 cid.<br>
+'''*'''The 1963 "326" engine had an actual displacement of 336 ci due to its 3.78" bore.<br>
-'''**''' The 303 and 366 were not productions engines.
+'''**''' The 303 and 366 were not productions engines.<br>
+'''***'''The 350 engine actually displaced 354 ci.
 <br>
@@ Line 389: / Line 395: @@
      <td align="center">Pressed-in*</td>
    </tr>
-   <tr>
+   <tr bgcolor="#F1F1F1">
      <td align="center">3H</td>
      <td align="center">400 4-bbl Manual</td>
@@ Line 401: / Line 407: @@
      <td align="center">Pressed-in*</td>
    </tr>
-   <tr>
+   <tr bgcolor="#F1F1F1">
      <td align="center">7H</td>
      <td align="center">400 4-bbl Auto</td>
@@ Line 408: / Line 414: @@
    </tr>
    <tr>
-     <td colspan="4" align="center" tr bgcolor="#FFF8DC">*All rocker arms studs are threaded beginning with unit number 709986, assembled on or about May 7, 1973<br></td>
+     <td colspan="4" align="center">*All rocker arms studs are threaded beginning with unit number 709986, assembled on or about May 7, 1973<br></td>
    </tr>
 </table><br>
-===Head code identifiers===
+===Secondary head code identifiers===
 ====1973-'74 4X, 46, 4C, 16/X====
@@ Line 422: / Line 428: @@
    <th align="center">Valve Length<br>(in.)</th>
    <th align="center">CID</th>
 </tr>
 <tr>
-<td align="center">1H / 1 </td><td align="center">4X </td><td align="center">112.30</td><td align="center">2.11/1.66</td><td align="center">4.78</td><td align="center">455 </td>
+<td align="center">'''1H / 1'''</td><td align="center">4X </td><td align="center">112.30</td><td align="center">2.11/1.66</td><td align="center">4.78</td><td align="center">455 </td>
+</tr>
+<tr bgcolor="#F1F1F1">
+<td align="center">'''2H'''</td><td align="center">46</td><td align="center">96.17</td><td align="center">1.96/1.66</td><td align="center">4.86</td><td align="center">350</td>
 </tr>
 <tr>
-<td align="center">2H </td><td align="center">46</td><td align="center">96.17</td><td align="center">1.96/1.66</td><td align="center">4.86</td><td align="center">350</td>
+<td align="center">'''3H / 3'''</td><td align="center">4X</td><td align="center">98.21</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
 </tr>
+<tr bgcolor="#F1F1F1">
-<tr>
+<td align="center">'''4H / 4'''</td><td align="center">4X</td><td align="center">98.94</td><td align="center">1.96/1.66</td><td align="center">4.86</td><td align="center">350/400</td>
-<td align="center">3H / 3</td><td align="center">4X</td><td align="center">98.21</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
 </tr>
 <tr>
-<td align="center">4H / 4</td><td align="center">4X</td><td align="center">98.94</td><td align="center">1.96/1.66</td><td align="center">4.86</td><td align="center">350/400</td>
+<td align="center">'''5H'''</td><td align="center">4C (AIR)</td><td align="center">96.17</td><td align="center">1.96/1.66</td><td align="center">4.86</td><td align="center">350</td>
 </tr>
+<tr bgcolor="#F1F1F1">
-<tr>
-<td align="center">5H </td><td align="center">4C (AIR)</td><td align="center">96.17</td><td align="center">1.96/1.66</td><td align="center">4.86</td><td align="center">350</td>
-</tr>
-<tr>
 <td align="center">6H </td><td align="center">46</td><td align="center">96.17</td><td align="center">1.96/1.66</td><td align="center">4.86</td><td align="center">350</td>
 </tr>
 <tr>
-<td align="center">6H </td><td align="center">16/X</td><td align="center">110.74</td><td align="center">2.11/1.77</td><td align="center">4.97</td><td align="center">455 SD</td>
+<td align="center">'''6H'''</td><td align="center">16/X</td><td align="center">110.74</td><td align="center">2.11/1.77</td><td align="center">4.97</td><td align="center">455 SD</td>
 </tr>
+<tr bgcolor="#F1F1F1">
-<tr><td align="center">7H </td><td align="center">4X</td><td align="center">98.21</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
+<td align="center">'''7H'''</td><td align="center">4X</td><td align="center">98.21</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
 </tr>
 <tr>
-<td align="center">8H / 8</td><td align="center">4C (AIR)</td><td align="center">98.94</td><td align="center">1.96/1.66</td><td align="center">4.86</td><td align="center">400</td>
+<td align="center">'''8H / 8'''</td><td align="center">4C (AIR)</td><td align="center">98.94</td><td align="center">1.96/1.66</td><td align="center">4.86</td><td align="center">400</td>
-</tr>
+</tr></table><br>
- <tr>
+====1975 (early) 5C, 51====
-    <td colspan="6" align="center" bgcolor="#FFF8DC">*All rocker arm studs are threaded beginning with unit number 709986, assembled on or about May 7, 1973<br></td>
-  </tr>
-</table><br>
-====1975 (early) 5C, 51, 5I====
 <table border="2" cellpadding="2" cellspacing="0"><tr bgcolor="#DDDFFF">
-   <th align="center">Stamped ID</th>
+   <th align="top">Stamped ID</th>
    <th align="center">Head #</th>
    <th align="center">Chamber Volume<br>(cc)</th>
@@ Line 473: / Line 465: @@
    <th align="center">Valve Length<br>(in.)</th>
    <th align="center">CID</th>
+</tr>
-</tr>
 <tr>
-<td align="center"> 4</td><td align="center">5C</td><td align="center">93.74</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">350</td>
+<td align="center">'''4'''</td><td align="center">5C</td><td align="center">93.74</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">350</td>
 </tr>
+<tr bgcolor="#F1F1F1">
-<tr>
+<td align="center">'''6'''</td><td align="center">5C / 51</td><td align="center">124.51</td><td align="center">2.11/1.66</td><td align="center">4.71</td><td align="center">455</td>
-<td align="center">6 </td><td align="center">5C / 51</td><td align="center">124.51</td><td align="center">2.11/1.66</td><td align="center">4.71</td><td align="center">455</td>
 </tr>
 <tr>
-<td align="center">7 </td><td align="center">5C (AIR)</td><td align="center">100.04</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
+<td align="center">'''7'''</td><td align="center">5C (AIR)</td><td align="center">100.04</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
 </tr>
+<tr bgcolor="#F1F1F1">
-<tr>
+<td align="center">'''8'''</td><td align="center">5C</td><td align="center">100.04</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
-<td align="center"> 8</td><td align="center">5C</td><td align="center">100.04</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
 </tr>
 <tr>
-<td align="center"> 9</td><td align="center">5C (AIR)</td><td align="center">93.74</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">350</td>
+<td align="center">'''9'''</td><td align="center">5C (AIR)</td><td align="center">93.74</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">350</td>
 </tr>
 </table><br>
@@ Line 506: / Line 492: @@
    <th align="center">Valve Length<br>(in.)</th>
    <th align="center">CID</th>
+</tr>
-</tr>
 <tr>
 <th rowspan="6" bgcolor="#FFF8DC">1975-'76</th>
 <td align="center"> 4</td><td align="center">6X</td><td align="center">93.74</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">350</td>
 </tr>
+<tr bgcolor="#F1F1F1">
-<tr>
+<td align="center">6</td><td align="center">6X</td><td align="center">124.51</td><td align="center">2.11/1.66</td><td align="center">4.71</td><td align="center">455</td>
-<td align="center">6 </td><td align="center">6X</td><td align="center">124.51</td><td align="center">2.11/1.66</td><td align="center">4.71</td><td align="center">455</td>
 </tr>
 <tr>
-<td align="center">6 </td><td align="center">6H</td><td align="center">124.51</td><td align="center">2.11/1.66</td><td align="center">4.71</td><td align="center">455</td>
+<td align="center">6</td><td align="center">6H</td><td align="center">124.51</td><td align="center">2.11/1.66</td><td align="center">4.71</td><td align="center">455</td>
 </tr>
+<tr bgcolor="#F1F1F1">
-<tr>
+<td align="center">7</td><td align="center">6S (AIR)</td><td align="center">100.04</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
-<td align="center">7 </td><td align="center">6S (AIR)</td><td align="center">100.04</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
 </tr>
 <tr>
-<td align="center"> 8</td><td align="center">6X</td><td align="center">100.04</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
+<td align="center">8</td><td align="center">6X</td><td align="center">100.04</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
 </tr>
+<tr bgcolor="#F1F1F1">
-<tr>
 <td align="center"> 9</td><td align="center">6S (AIR)</td><td align="center">93.74</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">350</td>
 </tr>
 <tr>
 <th rowspan="2" bgcolor="#FFF8DC">1977</th>
 <td align="center"> 4</td><td align="center">6X</td><td align="center">93.74</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">350 / 400 W72</td>
 </tr>
+<tr bgcolor="#F1F1F1">
-<tr>
 <td align="center"> 8</td><td align="center">6X</td><td align="center">100.04</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
 </tr>
 <tr>
 <th bgcolor="#FFF8DC">1978</th>
 <td align="center"> 8</td><td align="center">6X</td><td align="center">100.04</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400</td>
 </tr>
+<tr bgcolor="#F1F1F1">
-<tr>
 <th rowspan="2" bgcolor="#FFF8DC">1978-'79</th>
 <td align="center"> 4</td><td align="center">6X</td><td align="center">93.74</td><td align="center">2.11/1.66</td><td align="center">4.86</td><td align="center">400 W72</td>
-</tr>
+</tr></table><br>
-</table><br>
 ===Valve sizes===
@@ Line 586: / Line 558: @@
 ===Original head applications===
-<table border="1" cellpadding="1" ><tr><td colspan="5" align="center" bgcolor="#DDDFFF"><font size="4"><strong>CYLINDER HEAD APPLICATIONS</strong> </font></td></tr><tr><td bgcolor="#FFF8DC"><strong>Casting</strong></td><td bgcolor="#FFF8DC"><strong>Secondary ID</strong></td><td bgcolor="#FFF8DC"><strong>Valve diameter (in.)</strong></td><td bgcolor="#FFF8DC"><strong>Chamber volume</strong></td><td bgcolor="#FFF8DC"><strong>Original application</strong></td></tr><tr><td>4X</td><td>1/1H</td><td>2.11/1.66</td><td>112 cc</td><td>1973-'74 455ci 4-bbl</td></tr><tr><td>4X</td><td>3/3H</td><td>2.11/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 4-bbl manual trans.</td></tr><tr><td>4X</td><td>4/4H</td><td>1.96/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 2-bbl</td></tr><tr><td>4X</td><td>7/7H</td><td>2.11/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 4-bbl auto trans.</td></tr><tr><td>4C</td><td>5/5H</td><td>1.96/1.66</td><td>96 cc</td><td>1973-'74 350ci 2-bbl w/A.I.R.</td></tr><tr><td>4C</td><td>8/8H</td><td>1.96/1.66</td><td>98 cc</td><td>1973-'74 400ci 2-bbl w/A.I.R.</td></tr><tr><td>46</td><td>6/6H'''*'''</td><td>1.96/1.66</td><td>96 cc</td><td>1973-'74 350ci</td></tr><tr><td>5C</td><td>4</td><td>2.11/1.66</td><td>92-94 cc</td><td>1975 350ci</td></tr><tr><td>5C</td><td>7</td><td>2.11/1.66</td><td>99-101 cc</td><td>1975 400ci w/A.I.R.</td></tr><tr><td>5C</td><td>8</td><td>2.11/1.66</td><td>99-101 cc</td><td>1975 400ci</td></tr><tr><td>5C</td><td>9</td><td>2.11/1.66</td><td>92-94 cc</td><td>1975 350ci w/A.I.R.</td></tr><tr><td>6X</td><td>4</td><td>2.11/1.66</td><td>92-94 cc</td><td>Mid 1975-'77 350ci; 1977-'79 W72 400ci</td></tr><tr><td>6X</td><td>8</td><td>2.11/1.66</td><td>99-101 cc</td><td>Mid 1975-'78 400ci</td></tr><tr><td>6S</td><td>7</td><td>2.11/1.66</td><td>99-101 cc</td><td>Mid 1975-'76 400ci w/A.I.R.</td></tr><tr><td>6S</td><td>9</td><td>2.11/1.66</td><td>92-94 cc</td><td>Mid 1975-'76 350ci w/A.I.R.</td></tr><tr><td>51</td><td>6</td><td>2.11/1.66</td><td>124.5 cc</td><td>1975 455ci</td></tr><tr><td>6H</td><td>6</td><td>2.11/1.66</td><td>124.5 cc</td><td>Late 1975-'76 455ci</td></tr><tr><td bgcolor="#FFF8DC" colspan="5">'''*'''Some have been reported to have a secondary stamp of "2"</td></tr></table>
+<table  border="1" cellpadding="2" cellspacing="0"><tr><td colspan="5" align="center" bgcolor="#DDDFFF"><font size="4"><strong>CYLINDER HEAD APPLICATIONS</strong> </font></td></tr><tr><td bgcolor="#FFF8DC"><strong>Casting</strong></td><td bgcolor="#FFF8DC"><strong>Secondary ID</strong></td><td bgcolor="#FFF8DC"><strong>Valve diameter (in.)</strong></td><td bgcolor="#FFF8DC"><strong>Chamber volume</strong></td><td bgcolor="#FFF8DC"><strong>Original application</strong></td></tr><tr bgcolor="#F1F1F1"><td>4X</td><td>1/1H</td><td>2.11/1.66</td><td>112 cc</td><td>1973-'74 455ci 4-bbl</td></tr><tr><td>4X</td><td>3/3H</td><td>2.11/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 4-bbl manual trans.</td></tr><tr bgcolor="#F1F1F1"><td>4X</td><td>4/4H</td><td>1.96/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 2-bbl</td></tr><tr><td>4X</td><td>7/7H</td><td>2.11/1.66</td><td>98-99 cc</td><td>1973-'74 400ci 4-bbl auto trans.</td></tr><tr bgcolor="#F1F1F1"><td>4C</td><td>5/5H</td><td>1.96/1.66</td><td>96 cc</td><td>1973-'74 350ci 2-bbl w/A.I.R.</td></tr><tr><td>4C</td><td>8/8H</td><td>1.96/1.66</td><td>98 cc</td><td>1973-'74 400ci 2-bbl w/A.I.R.</td></tr><tr bgcolor="#F1F1F1"><td>46</td><td>6/6H'''*'''</td><td>1.96/1.66</td><td>96 cc</td><td>1973-'74 350ci</td></tr><tr><td>5C</td><td>4</td><td>2.11/1.66</td><td>92-94 cc</td><td>1975 350ci</td></tr><tr bgcolor="#F1F1F1"><td>5C</td><td>7</td><td>2.11/1.66</td><td>99-101 cc</td><td>1975 400ci w/A.I.R.</td></tr><tr><td>5C</td><td>8</td><td>2.11/1.66</td><td>99-101 cc</td><td>1975 400ci</td></tr><tr bgcolor="#F1F1F1"><td>5C</td><td>9</td><td>2.11/1.66</td><td>92-94 cc</td><td>1975 350ci w/A.I.R.</td></tr><tr><td>6X</td><td>4</td><td>2.11/1.66</td><td>92-94 cc</td><td>Mid 1975-'77 350ci; 1977-'79 W72 400ci</td></tr><tr bgcolor="#F1F1F1"><td>6X</td><td>8</td><td>2.11/1.66</td><td>99-101 cc</td><td>Mid 1975-'78 400ci</td></tr><tr><td>6S</td><td>7</td><td>2.11/1.66</td><td>99-101 cc</td><td>Mid 1975-'76 400ci w/A.I.R.</td></tr><tr bgcolor="#F1F1F1"><td>6S</td><td>9</td><td>2.11/1.66</td><td>92-94 cc</td><td>Mid 1975-'76 350ci w/A.I.R.</td></tr><tr><td>51</td><td>6</td><td>2.11/1.66</td><td>124.5 cc</td><td>1975 455ci</td></tr><tr bgcolor="#F1F1F1"><td>6H</td><td>6</td><td>2.11/1.66</td><td>124.5 cc</td><td>Late 1975-'76 455ci</td></tr><tr><td colspan="5">'''*'''Some reported to have a secondary stamp of "'''2'''"</td></tr></table>
 <br>
@@ Line 736: / Line 708: @@
 ==Parts interchangeability==
 Based on info from teufert.net and Ken's Speed & Machine.
-<table border="1">
+<table border="1" cellpadding="2" cellspacing="0">
 <tr valign="center" align="middle"><td bgcolor="#DDDFFF"><font size="4"> <strong>PART:</strong></font></td>
 <td bgcolor="#DDDFFF"><font size="4"><strong>INTERCHANGE YEARS:</strong> </font></td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Block:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Block:</strong></td>
 <td >1955,1956,1957,1959-'60,1961-'64 (full size V8), 1964-'69 (Tempest/Grand Prix V8), 1970-'79<br> '''Note:''' No block mount starter holes on pre-1964 blocks</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Bellhousing:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Bellhousing:</strong></td>
 <td >1955, 1956-'57, 1958-'60, 1961-'64 (fullsize), 1964-'79 (all except 1964 fullsize)</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Oil pump:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Oil pump:</strong></td>
 <td >1955-'58, 1959-'79; all use the same oil pump shaft</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Oil pan:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Oil pan:</strong></td>
 <td >1955-'58, 1959-'60, 1961-'63, 1964, 1965-'71, 1972-'79<br>'''Note:''' Same pan can be used from 1964-on with proper rear pan seal</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Windage tray:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Windage tray:</strong></td>
      <td >1955-'58, 1959-'60, 1961-'62, 1963, 1964, 1965-'72<br>'''Note:''' After 1972 some blocks have no provision for windage tray mounting. #2 and #4 main cap holes are for windage tray mounting. Center main cap holes (#3 cap) for lower dipstick mounting only</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Oil filter:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Oil filter:</strong></td>
      <td >1955-'59, 1960-'79</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Oil filter mount:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Oil filter mount:</strong></td>
      <td >1955-'59, 1960-'62, 1963, 1964-'70 (straight), 1967-'79 (tilted)<br>'''Note:''' There are basically two different oil filter housings: Pre-1970 straight mount and the later angled housing mount. Also special adapter for a rearward facing oil filter housing to clear RA III and IV exhaust</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Crankshaft:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Crankshaft:</strong></td>
      <td >1955-'56, 1957-'58, 1959-'66 (3" main), 1967-'78 (3" main), 1962-'76 (3.25" main).<br> For all engines after 1964: 326, 350, 389 and 400 use the 3" mains. 421, 428 and 455 use the 3.25" mains.<br>More at [[Pontiac V8 engine #Cranks|Cranks]]</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Harmonic balancer:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Harmonic balancer:</strong></td>
      <td >1955-'62, 1963, 1964, 1965, 1966, 1967, 1968-'79<br> '''Note:''' Some 1977-up 400 and 301 use a crankshaft hub without a rubber torsional ring</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Flywheel:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Flywheel:</strong></td>
      <td >1955-'57, 1958-'60, 1961-'62, 1963, 1964-'79<br>'''Note:''' There are two different diameter flanges used on the 400 crank after 1975: 2-1/2" and 2-3/4".<br> All 350/389/400/428 and 455 with same flange will interchange.<br> Also watch the pilot ID on early pre-1964 389 Armasteel cranks when using an automatic</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Connecting rods:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Connecting rods:</strong></td>
      <td >1955-'79<br> '''Note:''' Before 1962 forged rods were installed, but weaker then the later cast rod unless heat treated and prepped. Swapping to the earlier lighter forged rod requires re-balancing<br>More at [[Pontiac V8 engine#Rods|Rods]]</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Pistons:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Pistons:</strong></td>
      <td >Must match the bore, stroke, and head series<br> '''Note:''' 455 SD piston use SD rod unless the pin boss is internally milled. <br>More at [[Pontiac V8 engine #Pistons|Pistons]] </td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Wrist pins:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Wrist pins:</strong></td>
      <td >1955-'57, 1958-'62, 1963-'65, 1966-'79 Some SD pins are longer</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Heads:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Heads:</strong></td>
      <td >1955, 1956-'60, 1961-'66, 1967-'79<br> '''Note:''' Valve centers were widened in 1967 for larger valve diameters.<br>More at [[Pontiac V8 engine #Heads|Heads]]</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Rocker arm:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Rocker arm:</strong></td>
      <td >1955, 1956-'60, 1961-'64, 1963 (421 HO)-'64 (GTO Tripower), 1965, 1966, 1967 (326 only), 1967-'79<br>'''Note:''' Ram Air IV engines used a 1.65 ratio, the pushrod holes were factory enlarged for this.<br> All other heads have to be modified to use 1.65 rocker arms</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Pushrods:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Pushrods:</strong></td>
      <td >1955-'60, 1961-'66, 1967-'76 (except longer Ram Air IV)<br> '''Note:''' Match pushrod to year of head</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Valve covers:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Valve covers:</strong></td>
      <td >1955-'57, 1958-'60, 1961-'62, 1963-'66, 1967-'79</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Lifters:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Lifters:</strong></td>
      <td >1955, 1956-'79</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Camshaft:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Camshaft:</strong></td>
      <td >1955-'79 (except Ram Air V/455 Super Duty).<br>More at [[Pontiac V8 engine #Cams|Cams]]</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Intake manifold:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Intake manifold:</strong></td>
      <td >1955, 1956, 1957-'58, 1959-'60, 1961-'62, 1963-'64, 1965-'71, 1972-'79<br>More at [[Pontiac V8 engine #Intakes|Intakes]] and [[Pontiac V8 engine #Heat cross over|Heat cross over]]<br></td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Exhaust manifolds:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Exhaust manifolds:</strong></td>
      <td >1955, 1956, 1957, 1958, 1959-'79 (D-port); 1968-'74 (round port)</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Distributor:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Distributor:</strong></td>
      <td >1955-'79 (except Ram Air V/455 Super Duty)</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Starter:</strong></td>
+<tr valign="center" align="middle"><td ><strong>Starter:</strong></td>
      <td >1955, 1956-'60, 1961-'64 (fullsize), 1964 (Tempest/Grand Prix)-'79</td></tr>
-<tr valign="center" align="middle"><td bgcolor="#FFF8DC"><strong>Timing Cover:</strong></td>
+<tr bgcolor="#F1F1F1" valign="center" align="middle"><td ><strong>Timing Cover:</strong></td>
-     <td >1955-'59, 1960, 1961-'62 (inc. Tempest "Trophy" 4), 1963, 1963 1/2-'65, 1966-'67, 1968, 1969-'79<br>The only difference in the 1968-up timing covers are the timing indictor markings.<br> Some late model 400 and 301 covers have a plastic bolt on tab.<br>More at [[Pontiac V8 engine #Timing covers|Timing covers]]</td></tr>
+     <td >1955-'59, 1960, 1961-'62 (inc. Tempest "Trophy" 4), 1963, 1963 1/2-'65, 1966-'67, 1968, 1969-'79<br>The only difference in the 1968-up timing covers are the timing indicator markings.<br> Some late model 400 and 301 covers have a plastic bolt on tab.<br>More at [[Pontiac V8 engine #Timing covers|Timing covers]]</td></tr>
 </table><br>
@@ Line 818: / Line 790: @@
 ;Hotrodders Knowledge Base
 *[http://www.hotrodders.com/kb/pontiac-engines Pontiac engines]
+<br><br>
-==Caution==
-{{warning|Be sure to verify '''''all''''' Pontiac info found in print, by word of mouth, or on the internet (including here). There's a LOT of erroneous and misleading info out there, even from so-called experts, pros and gurus.}}<br>
 {{newarticle1}}
 [[Category:Engine]]