Big block Chevy heads
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Use anti seize compound on all threaded aluminum bolt or sender holes, especially the spark plug threads. Only remove fasteners or senders when the head is cold. | Use anti seize compound on all threaded aluminum bolt or sender holes, especially the spark plug threads. Only remove fasteners or senders when the head is cold. | ||
| − | == | + | ==Common BBC casting numbers== |
| − | ===BBC casting | + | ;Note<nowiki>:</nowiki> All measurements in inches unless otherwise indicated. |
| + | |||
| + | <table table border="1" cellpadding="2" cellspacing="0" ><tr bgcolor="#FFF8DC" > <td>'''Casting No.'''</td> <td>'''Part No.'''</td> <td>'''Application'''<br>Year CID/HP RPO</td> <td>'''Chamber'''<br> (CC)</td> <td>'''Intake'''<br>(Inches)</td> <td>'''Exhaust'''<br>(Inches)</td> </tr> <tr> <td>336781</td> <td>336780</td> <td>'74 454/270 HP</td> <td>113</td> <td>2.06</td> <td>1.72</td> </tr> <tr> <td>353049</td> <td>353047</td> <td>'73 454/275 HP</td> <td>113</td> <td>2.06</td> <td>1.72</td> </tr> <tr> <td>3999241</td> <td>3999240</td> <td>'72 454/270 HP </td> <td>105</td> <td>2.06</td> <td>1.72</td> </tr> <tr> <td>3993820</td> <td> </td> <td>'71 454/365 HP</td> <td>113</td> <td>2.06</td> <td>1.72</td> </tr> <tr> <td>3964291</td> <td>3964287</td> <td>'69 427/435 HP</td> <td>118</td> <td>2.19</td> <td>1.88</td> </tr> <tr> <td>3964290</td> <td> </td> <td>'69 427/390 & 400 HP; '70 454/390 HP</td> <td>106</td> <td>2.06</td> <td>1.72</td> </tr> <tr> <td>3946074</td> <td> </td> <td>'69 427/430 HP L88 & ZL1; '71 454 LS6</td> <td>118</td> <td>2.19</td> <td>1.88</td> </tr> <tr> <td>3931063</td> <td> </td> <td>'69 427/390 & 400 HP</td> <td>100</td> <td>2.06</td> <td>1.72</td> </tr> <tr> <td>3919842</td> <td> </td> <td>'68 427/430 & 435 HP L88 & L89; '69 427 L89</td> <td>106</td> <td>2.19</td> <td>1.72</td> </tr> <tr> <td>3919840</td> <td> </td> <td>Late '67-'69 427/435 HP L71</td> <td>106</td> <td>2.19</td> <td>1.72</td> </tr> <tr> <td>3917215</td> <td> </td> <td>'68 427/390 & 400 HP </td> <td>100</td> <td>2.06</td> <td>1.72</td> </tr> <tr> <td>3909802</td> <td> </td> <td>Late '67 427/390 & 400 HP</td> <td>100</td> <td>2.06</td> <td>1.72</td> </tr> <tr> <td>3904392</td> <td> </td> <td>'67 427/430 HP L88 & L89</td> <td>106</td> <td>2.19</td> <td>1.72</td> </tr> <tr> <td>3904391</td> <td> </td> <td>'67 427/435 HP L71</td> <td>106</td> <td>2.19</td> <td>1.72</td> </tr> <tr> <td>3094390</td> <td> </td> <td>Early '67 427/390 & 400 HP</td> <td>98</td> <td>2.06</td> <td>1.72</td> </tr> <tr> <td>3873858</td> <td> </td> <td>'66 427/425 HP</td> <td>108</td> <td>2.19</td> <td>1.72</td> </tr> <tr> <td>3872702</td> <td> </td> <td>'66 427/390 HP</td> <td>98</td> <td>2.06</td> <td>1.72</td> </tr> <tr> <td>3856208</td> <td> </td> <td>'65 396/425 HP</td> <td>108</td> <td>2.19</td> <td>1.72</td> </tr> </table><br> | ||
| + | |||
| + | ===BBC casting number resources=== | ||
*[http://outintheshop.com/faq/casting/castings2.html Chevy BB casting number "go-to" site] from outintheshop.com | *[http://outintheshop.com/faq/casting/castings2.html Chevy BB casting number "go-to" site] from outintheshop.com | ||
*[http://www.nastyz28.com/bbcmenu.php Big Block Chevy Engine Parts Identification] from nastyz28.com | *[http://www.nastyz28.com/bbcmenu.php Big Block Chevy Engine Parts Identification] from nastyz28.com | ||
| − | * | + | *{{Note1}} The Mortec site is no longer available. BBC Mortec info is listed [[Identifying Chevy engines#Mortec_BBC_block_casting_numbers|'''here''']]. |
[[Category:GM]] | [[Category:GM]] | ||
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