@@ Line 136: / Line 136: @@
 ==Mortec info==
 {{Note1}} The Mortec site is no longer available. The info has been archived here.
-===Mortec SBC block casting numbers===
 *Return to '''[[Identifying Chevy engines #SBC engine casting numbers|SBC engine casting numbers]] ''' above.
 *Return to [http://www.crankshaftcoalition.com/wiki/Swirl_port_SBC_heads#Resources '''Swirl port SBC heads/Resources''']
-<pre>SBC BLOCK CASTING NUMBERS
+===Mortec SBC block casting numbers===
+<pre style="border:none;">
+SBC BLOCK CASTING NUMBERS
 CASTING NUMBER.....SIZE...YEAR...MAIN CAP BOLTS....NOTES
@@ Line 300: / Line 302: @@
 14101148...350...86-90...4...One-piece rear seal
 14102058...305...87-91...2...Roller cam, one-piece rear seal
-22551656.................4...Chevy/Olds Rocket block, 4.00"-4.190" bores,
+22551656.................4...Chevy/Olds Rocket block, 4.00"-4.190" bores, 2.45" main journal, splayed caps, dry sump,
-.45" main journal, splayed caps, dry sump, 2-piece rear seal, 9.025" deck
+-piece rear seal, 9.025" deck
-22551660.................4...Chevy/Olds Rocket block, 4.00"-4.190" bores,
+22551660.................4...Chevy/Olds Rocket block, 4.00"-4.190" bores, 400 main journal, splayed steel caps, wet sump,
-main journal, splayed steel caps, wet sump, raised cam,
+raised cam,
 -piece rear seal, 9.300" deck
 </pre>
 ===Mortec SBC head casting numbers===
-<pre>SMALL BLOCK HEAD CASTING NUMBERS:
+<pre style="border:none;">
+SMALL BLOCK HEAD CASTING NUMBERS:
 .....73......350..........76cc chamber, 2.02”/1.60”
@@ Line 319: / Line 322: @@
 .....75-81...262/267/305..6 or 7 exhaust bolt holes, 60cc chamber
 .....77-79...305..........60cc chamber
-.....75-86...350/400......76cc chamber, 1.72”/1.5”, 1.94”/1.5” or
+.....75-86...350/400......76cc chamber, 1.72”/1.5”, 1.94”/1.5” or 2.02”/1.6” valves
-.02”/1.6” valves
 .....75-84...350..........350
 .....76-up...350/400
@@ Line 357: / Line 359: @@
 3774684....62-64...327..........75cc chamber
 3774692....58-64...283..........60cc chamber
-3782461....64-66...327......Camel hump, no accessory holes,
+3782461....64-66...327......Camel hump, no accessory holes, 160cc/62cc port volumes, 62cc chamber
-cc/62cc port volumes, 62cc chamber
+3782461X...60-63...283/327..Camel hump, no accessory holes, larger 172cc/64cc port volumes, 62cc chamber
-3782461X...60-63...283/327..Camel hump, no accessory holes,
-larger 172cc/64cc port volumes, 62cc chamber
 3795896....63-65...283......60cc chamber
 3795896....62-64...327......60cc chamber
@@ Line 375: / Line 375: @@
 3848720....57-58...283
 3876775....60-67...283/327......75cc chamber
-3884520....60-67...283..........Some marked "Made in Canada",
+3884520....60-67...283..........Some marked "Made in Canada", 60cc chamber, also used by Studebaker
-cc chamber, also used by Studebaker
+3884520....62-67...327..........Some marked "Made in Canada", 60cc chamber, also used by Studebaker
-3884520....62-67...327..........Some marked "Made in Canada",
+3890462....66-67...302/327/350..Camel hump, no accessory holes, 64cc chamber
-cc chamber, also used by Studebaker
-3890462....66-67...302/327/350..Camel hump, no accessory holes,
-cc chamber
 3901068....87-up...350..........Crate motor, 285hp, 64cc chamber
 3911032....68......307/327......70cc chamber
@@ Line 388: / Line 385: @@
 3912313....65-67...327
 3917290....67-68...307/327
-3917291....67-68...302/327/350..Camel hump, no accessory holes,
+3917291....67-68...302/327/350..Camel hump, no accessory holes, 64cc chamber
-cc chamber
 3917292....68......327/350......Camel hump, 64cc chamber
 3917293....67-68...307/327......75cc chamber
@@ Line 406: / Line 402: @@
 3946812....69......350
 3946813....69-79...350..........Truck
-3947040....68......327.........."Right angle" casting identifier,
+3947040....68......327.........."Right angle" casting identifier, 64cc chamber, good HP head, used in trucks, no accessory holes
-cc chamber, good HP head, used in trucks, no accessory holes
+3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head
-3947041....69-70...302/350......"Right angle" casting identifier,
+3947041X...69-70...302/350......"Right angle" casting identifier, 64cc chamber, 165cc int. port, accessory holes, good HP head
-cc chamber, accessory holes, good HP head
-3947041X...69-70...302/350......"Right angle" casting identifier,
-cc chamber, 165cc intake port, accessory holes, good HP head
 3951598....70......400..........76cc chamber
 3964286............350
@@ Line 419: / Line 412: @@
 Canadian 350/300hp production use in Pontiac, 64cc, straight or angle plug
 3973414....70......350..........LT1-350/370hp, camel hump, 64cc chamber
-3973487....71-72...350..........1.94”/1.5” or 2.02”/1.6” valves,
+3973487....71-72...350..........1.94”/1.5” or 2.02”/1.6” valves, was also used on '71 350/330hp LT1, 75cc chamber
-was also used on '71 350/330hp LT1, 75cc chamber
 3973487X...71-72...350..........1.94”/1.5” or 2.02”/1.6” valves, 75cc chamber
 3973493....71-72...400..........76cc chamber
@@ Line 429: / Line 421: @@
 3986339X...71......307/350......74cc chamber
 3986388....68-76...307/350
-3991492....70......350..........LT1, camel hump, accessory holes,
+3991492....70......350..........LT1, camel hump, accessory holes, 64cc, straight plug
-cc, straight plug
+3991492....70-up................Over the counter, camel hump, 64cc, straight or angle plug
-3991492....70-up................Over the counter, camel hump, 64cc,
+3998916....72......350..........Also used w/'72 350 LT1, big valves, screw in studs, 76cc chamber
-straight or angle plug
-3998916....72......350..........Also used w/'72 350 LT1, big valves,
-screw in studs, 76cc chamber
 3998920....72-73...350
 3998991....72-73...307/350......75cc chamber
 3998993....72-73...307/350......75cc chamber
-3998993....current..350.........Goodwrench crate motors, "Hecho en Mexico",
+3998993....current..350.........Goodwrench crate motors, "Hecho en Mexico", 75cc chamber
-cc chamber
 3998997....72-73...350/400......76cc chamber
 3998997....78-84...305/350......76cc chamber
 4079261....75......350
-10033867........................Aluminum , over the counter Pontiac 23º
+10033867........................Aluminum , over the counter Pontiac 23º head, 62cc, angle plug, 196cc intake port
-head, 62cc, angle plug, 196cc intake port
+10045434........................Over the counter Pontiac 15º  head, 55cc, angle plug, raised runner, aluminum, "roll over" head
-10045434........................Over the counter Pontiac 15º  head,
+10051101........................Bowtie, aluminum, 55cc, angle plug, raised runner, 196cc intake port
-cc, angle plug, raised runner, aluminum, "roll over" head
-10051101........................Bowtie, aluminum, 55cc, angle plug,
-raised runner, 196cc intake port
 10065202...87-95...350..........Truck
 10065203...87-95...350..........Truck
@@ Line 455: / Line 440: @@
 10065206...87-95...350
 10065207...87-95...305
-10088113...88-up...350..........Aluminum, 58cc, angle plug, raised "D"-port
+10088113...88-up...350..........Aluminum, 58cc, angle plug, raised "D"-port exhaust, 1.94"/1.5" valves
-exhaust, 1.94"/1.5" valves
+10093328........................Over the counter, Pontiac 15º head, aluminum, 224cc intake port, 61cc chamber, "roll over" head
-10093328........................Over the counter, Pontiac 15º head,
-aluminum, 224cc intake port, 61cc chamber, "roll over" head
 10106178...90......350..........LT5, ZR1, DOHC, 32-valve, pass. side, aluminum
 10106179...90......350..........LT5, ZR1, DOHC, 32-valve, drvs. side, aluminum
 10110810...91-up...350..........Gen. 1, 65cc chamber
 10120928...87-95...350
-10125320...94-96...350..........Gen. 2 LT1, cast iron version,
+10125320...94-96...350..........Gen. 2 LT1, cast iron version, used on "9C1" Police package, Impala SS, Cadillac Fleetwood,
-used on "9C1" Police package, Impala SS,
+Buick Roadmaster, reverse flow cooling
-Cadillac Fleetwood, Buick Roadmaster, reverse flow cooling
+10128374...92-up...350.....Gen. 2 LT1, 53cc, angle plug, aluminum, reverse flow cooling, 175cc/68cc ports
-10128374...92-up...350..........Gen. 2 LT1, 53cc, angle plug,
+10134352....Bowtie, 45cc, angle plug, "low" port, 223cc intake port, aluminum, 18º race head
-aluminum, reverse flow cooling, 175cc/68cc ports
+10134363..........NOTE: This casting # has been used in several different versions of aluminum 18º and 15º Bowtie race heads.
-10134352........................Bowtie, 45cc, angle plug, "low" port,
+Different chamber volumes, port volumes, port locations, valve sizes, etc. were used. Check this casting carefully
-cc intake port, aluminum, 18º race head
+to determine which features it may have. There are at least six different versions as of 11/99.
-10134363........................NOTE: This casting # has been used in
-several different versions of aluminum 18º and 15º Bowtie race heads.
-Different chamber volumes, port volumes, port locations, valve sizes,
-etc. were used. Check this casting carefully to determine which features
-it may have. There are at least six different versions as of 11/99.
 10147898...95-98...350..........Gen. 1 crate motor
 10159550...87-95...350
@@ Line 486: / Line 464: @@
 10185040........................Bowtie, aluminum, 45cc chamber, 2nd. version,
 symmetrical ports, 240cc intake port, splayed valves
-10205245...93......350..........Gen. 2 LT1, aluminum, reverse flow cooling,
+10205245...93......350..........Gen. 2 LT1, aluminum, reverse flow cooling, 175cc/68cc port volumes
-cc/68cc port volumes
+10207643...94-96...350..........Gen. 2 LT1, aluminum, reverse flow cooling, 175cc/68cc port volumes
-10207643...94-96...350..........Gen. 2 LT1, aluminum, reverse flow cooling,
-cc/68cc port volumes
 10208890...94-96...265..........Gen. 2, L99, 4.3 Liter V8, cast iron, reverse flow
 10215339...97......350..........Gen. 3, LS1, aluminum, 68cc
 10225121...94-95...350..........LT5, ZR1, DOHC, 32-valve, drvs. side, aluminum
 10225122...95......350..........LT5, ZR1, DOHC, 32-valve, pass. side, aluminum
-10239902...96-up...350..........Gen. 2 LT4, aluminum, reverse flow cooling,
+10239902...96-up...350..........Gen. 2 LT4, aluminum, reverse flow cooling, 195cc port, 54.4cc chamber, angle plug
-cc port, 54.4cc chamber, angle plug
+10239906...96-up...350.........."Vortec 5700", "L31", 64cc chamber, 170cc intake port, 1.94"/1.5" valves
-10239906...96-up...350.........."Vortec 5700", "L31", 64cc chamber,
+12367712...99-up................"Fast Burn", aluminum, 210cc intake port, 2.00”/1.55” valves, 62cc chamber
-cc intake port, 1.94"/1.5" valves
+12367713...99-up................"Fast Burn" used on ZZ430 crate motor, aluminum, 210cc intake port, 2.00”/1.55” valves,
-12367712...99-up................"Fast Burn", aluminum, 210cc intake port,
+cc chamber
-.00”/1.55” valves, 62cc chamber
+12480005...2000.................LS1 "GTZ", aluminum, 38cc chamber, 2.125"/1.625" valves, angle plug
-12367713...99-up................"Fast Burn" used on ZZ430 crate motor,
-aluminum, 210cc intake port, 2.00”/1.55” valves, 62cc chamber
-12480005...2000.................LS1 "GTZ", aluminum, 38cc chamber,
-.125"/1.625" valves, angle plug
 12480011...97-up................Bowtie "SB2.2", aluminum, 2nd. version of "SB2",
 cc chamber, "mirror ports", revised valve angles & plug location
@@ Line 512: / Line 484: @@
 12551561...96......350..........Gen. 2, "LT1", aluminum
 12552520...97-up...305..........Vortec, truck
-12554290...94-96...350..........Gen. 2, "LT1", cast iron version,
+12554290...94-96...350..........Gen. 2, "LT1", cast iron version, used on "9C1" police package, Impala SS,
-used on "9C1" police package, Impala SS,
 Cadillac Fleetwood, Buick Roadmaster, reverse flow cooling
 12554291...95-96...265..........Gen. 2, "L99", cast iron
@@ Line 519: / Line 490: @@
 12556743...99......325..........Gen. 3, 5.3L, aluminum, truck, van
 12558059...97......305..........Vortec, truck, 1.84"/1.5" valves
-12558062...98......350..........L31 Vortec, truck, 64cc chamber,
+12558062...98......350..........L31 Vortec, truck, 64cc chamber, 1.94”/1.5”, 170cc intake port
-.94”/1.5”, 170cc intake port
 12558806...97-98...350..........Gen. 3, "LS1", aluminum, 68cc chamber
 12559853...99-up...350..........Gen. 3, "LS1", aluminum, 68cc chamber
@@ Line 533: / Line 503: @@
 14008856...79-81...267
 14010201...82-85...305
-14011034........................Bowtie, cast iron, 64cc chamber,
+14011034........................Bowtie, cast iron, 64cc chamber, 184cc intake port volume, angle plug, "Phase 2" head
-cc intake port volume, angle plug, "Phase 2" head
+14011049........................Bowtie, aluminum, 55cc chamber, angle plug, 180cc intake port volume, "Phase 6"
-14011049........................Bowtie, aluminum, 55cc chamber,
+14011083...55-86...350..........Crate motor for years indicated. 285/300hp, 64cc chamber, 1.94"/1.5" valves
-angle plug, 180cc intake port volume, "Phase 6"
-14011083...55-86...350..........Crate motor for years indicated.
-/300hp, 64cc chamber, 1.94"/1.5" valves
 14014415...80-85...267/305
 14014416...80-86...305..........1.84"/1.5" valves, 58cc chamber
@@ Line 554: / Line 521: @@
 14022601...80-86...267/305......1.72"/1.5" or 1.84"/1.5" valves, 53cc chamber
 14022801...80-86...305
-14024816...........350..........76cc chamber, 1.94”/1.5” valves,
+14024816...........350..........76cc chamber, 1.94”/1.5” valves, Gen. 1 crate motor
-Gen. 1 crate motor
 14034806...78-82...267
 14034807...78-86...305
 14034808...80-86...350
-14034808...96-up...350..........76cc chamber, 1.94"/1.5" valves,
+14034808...96-up...350..........76cc chamber, 1.94"/1.5" valves, Gen. 1 Goodwrench crate motor
-Gen. 1 Goodwrench crate motor
 14034810...80-86...350..........Truck
 14034811...80-86...350..........Truck
@@ Line 573: / Line 538: @@
 14089119...86-88...350
 14094093...86-88...350
-14096217...55-86...350..........Crate motor, 285hp/300hp, 64cc chamber,
+14096217...55-86...350..........Crate motor, 285hp/300hp, 64cc chamber, 72º or 90º center intake manifold bolt angles
-º or 90º center intake manifold bolt angles
 14101081...87-95...305
-14101083...87-up...350..........Gen. 1, also used on crate motors,
+14101083...87-up...350..........Gen. 1, also used on crate motors, 285 or 300 hp, 64cc chamber, 72º center manifold bolt angles
-or 300 hp, 64cc chamber, 72º center manifold bolt angles
 14101128...86-87...350..........Aluminum, 58cc, angle plug
 14102187...87-91...305..........1.84"/1.5" valves
 14102191...87-up...350
 14102193...87-up...305/350......1.94"/1.5" valves
-22542525........................Dart/Olds/Chevy aluminum,
+22542525........................Dart/Olds/Chevy aluminum, 14º or 17º race head
-º or 17º race head
+24502559...96-97................Bowtie, "SB2", 1st. version, "mirror ports", aluminum, 196cc port, CNC version 280cc port,
-24502559...96-97................Bowtie, "SB2", 1st. version,
+cc chamber
-"mirror ports", aluminum, 196cc port, CNC version 280cc port, 38cc chamber
+25500141........................Buick/Chevy aluminum, 10º race head, 42cc chamber, symmetrical ports, 235cc intake port volume,
-25500141........................Buick/Chevy aluminum, 10º race head,
+.1"/1.625" valves
-cc chamber, symmetrical ports, 235cc intake port volume, 2.1"/1.625" valves
+25534351C..04-up................Gen. 1 Bowtie, cast iron Vortec head, 175cc/65cc ports, 2.00”/1.55” valves, "small port” head
-25534351C..04-up................Gen. 1 Bowtie, cast iron Vortec head,
+25534371C..04-up................Gen. 1 Bowtie, cast iron Vortec head, 206cc/77cc ports, 2.00”/1.55” valves, "large port” head
-cc/65cc ports, 2.00”/1.55” valves, "small port” head
+33417369...90-up...350..........Gen. 1 Goodwrench crate motor, "Hecho en Mexico", 76cc chamber
-25534371C..04-up................Gen. 1 Bowtie, cast iron Vortec head,
-cc/77cc ports, 2.00”/1.55” valves, "large port” head
-33417369...90-up...350..........Gen. 1 Goodwrench crate motor,
-"Hecho en Mexico", 76cc chamber
 </pre>
 ===Mortec BBC block casting numbers===
-<pre>BIG BLOCK CHEVY BLOCK CASTING NUMBERS:
+<pre style="border:none;">
+BIG BLOCK CHEVY BLOCK CASTING NUMBERS:
 NOTE: T = tall deck
 Oval includes both "peanut" (also called "round") ports and large oval ports
--326711.....................4-bolt, alum., CanAm, 4.44" bores,
+-326711.....................4-bolt, alum., CanAm, 4.44" bores, steel cylinder liners
-steel cylinder liners
 .....427T......68-85...4-bolt
 .....454.......70-86...
@@ Line 610: / Line 569: @@
 .....427T......68-85...4-bolt
 .....366T......68-90...4-bolt
-.....509.......70-71...4-bolt, alum., CanAm, 4.5" bores,
+.....509.......70-71...4-bolt, alum., CanAm, 4.5" bores, steel cylinder liners
-steel cylinder liners
 .....366T......77-78...4-bolt
 .....427T......77-90...4-bolt
@@ Line 645: / Line 603: @@
 3969854....402.......70-72...2 or 4-bolt
 3969858....427T......68-84...4-bolt
-3999289....454.......71-79...2 or 4-bolt, some "CE" replacement blocks
+3999289....454.......71-79...2 or 4-bolt, some "CE" replacement blocks had four bolt main caps
-had four bolt main caps
 3999290....396.......68-69...2 or 4-bolt, truck
 3999290....402.......70-72...2 or 4-bolt, truck
@@ Line 652: / Line 609: @@
 3999293....366T......68-90...4-bolt
 3999294....427T......68-84...4-bolt
-10051107...454...............4-bolt, Bowtie, Mark IV, 9.8" deck,
+10051107...454...............4-bolt, Bowtie, Mark IV, 9.8" deck, siamesed bores, 4.25" semi-finished bores, can be bored to 4.50"
-siamesed bores, 4.25" semi-finished bores, can be bored to 4.50"
 10069282...366T......90-91...4-bolt, Mark IV, tall deck
 10069284...427T..............4-bolt, Mark IV, tall deck
@@ Line 665: / Line 621: @@
 10237299...427T......96-up...4-bolt, Gen. 6, 7.0L, truck
 10237300...502.......96-up...4-bolt, Gen. 6, 4.466" bore
-12550312...427T......96-up...4-bolt, Gen. 6, 4.250" bore, fuel pump boss,
+12550312...427T......96-up...4-bolt, Gen. 6, 4.250" bore, fuel pump boss, clutch linkage pivot boss
-clutch linkage pivot boss
+12550313...454.......91-up...4-bolt, Gen. 5 crate motor, Gen. VI 4.25" bare block, fuel pump boss
-12550313...454.......91-up...4-bolt, Gen. 5 crate motor, Gen. VI 4.25"
-bare block, fuel pump boss
 12556110...496.......01-up...4-bolt, Gen. 7, 8.1L, "Vortec 8100", truck
 12561357...454.......96-up...4-bolt, Gen. 6
@@ Line 674: / Line 628: @@
 14015443...454.......87-90...2 or 4-bolt, Mark IV, truck, motorhome
 14015445...454.......78-90...2 or 4-bolt
-14044807...454T..............4-bolt, Bowtie, Mark IV, CNC prep, tall deck,
+14044807...454T..............4-bolt, Bowtie, Mark IV, CNC prep, tall deck, 4.25" or 4.495" bores
-.25" or 4.495" bores
 14096859...502...............4-bolt, Gen. 5, HO
-24502504...454...............4-bolt, Bowtie, Gen. 5, race prep,
+24502504...454...............4-bolt, Bowtie, Gen. 5, race prep, 9.8” "short" deck height
-.8” "short" deck height
+24502506...454T..............4-bolt, Bowtie, Gen. 5, race prep, 10.2” "tall" deck height
-24502506...454T..............4-bolt, Bowtie, Gen. 5, race prep,
-.2” "tall" deck height
 24502572.....................4-bolt, 4.5" bore Olds DRCE 2, 9.5" deck height
 25534402.....................4-bolt, 4.590" bore Olds DRCE 3, 9.25" deck height
@@ Line 686: / Line 637: @@
 ===Mortec BBC head casting numbers===
-<pre>BIG BLOCK CHEVY HEAD CASTING NUMBERS:
+<pre style="border:none;">
+BIG BLOCK CHEVY HEAD CASTING NUMBERS:
 .....68-84...oval...OPEN...396, 402, 366T, 427T, 454 Truck
@@ Line 704: / Line 656: @@
 .....68-69...oval...OPEN...366T
 3856206....65-66...oval..CLOSED..396, 97cc chamber
-3856208....65......rect..CLOSED..396/425hp, 109cc chamber
+3856208....65......rect..CLOSED..396/425hp, 109cc chamber 396/375hp "Z-16" Chevelle
-/375hp "Z-16" Chevelle
 3856213....66-82...oval..CLOSED..366T, 427T
 3856260....68......oval..CLOSED..396 truck
@@ Line 725: / Line 676: @@
 3933149....68-76...oval...OPEN...427T, 122cc chamber
 3935401....68-76...oval...OPEN...427T
-3946074....69&71...rect...OPEN...'69 427 L88, ZL1, aluminum, 118cc chamber,
+3946074....69&71...rect...OPEN...'69 427 L88, ZL1, aluminum, 118cc chamber, '71 454 LS6, "round exhaust port"
-'71 454 LS6, "round exhaust port"
+3964290....69-70...oval..CLOSED..396, 402, 427, 454, 101cc chamber, large or small hex spark plugs used
-3964290....69-70...oval..CLOSED..396, 402, 427, 454, 101cc chamber,
+3964291....69-72...rect..CLOSED..396, 402, 427, 454, 109cc chamber, large or small hex spark plugs used,
-large or small hex spark plugs used
+crate motor usage in years after 1970
-3964291....69-72...rect..CLOSED..396, 402, 427, 454, 109cc chamber,
-large or small hex spark plugs used, crate motor usage in years after 1970
 3965198....68-69...oval..CLOSED..396 truck
 3975950....68-70...oval...OPEN...396, 402 Truck, 366T, 427T
@@ Line 737: / Line 686: @@
 3986136....68-84...oval...OPEN...366T, 427T, 454 truck
 3993820....71......oval...OPEN...402, 113cc chamber, 255cc/114cc ports
-3993820....71-84...oval...OPEN...454 passenger and trucks, 113cc chamber,
+3993820....71-84...oval...OPEN...454 passenger and trucks, 113cc chamber, 255cc/114cc ports
-cc/114cc ports
 3994026....71......rect...OPEN...454 LS6, 118cc chamber
 3999241....72......oval...OPEN...402, 454, 113cc chamber
 6272292....70-78...oval...OPEN...402, 454
-6272990....70-up...rect...OPEN...454 service replacement, used on some
+6272990....70-up...rect...OPEN...454 service replacement, used on some Mark IV crate engines, 118cc chamber
-Mark IV crate engines, 118cc chamber
+10045427...........rect..........Pontiac/Chevy, aluminum, 91cc chamber, large port, race
-10045427...........rect..........Pontiac/Chevy, aluminum, 91cc chamber,
+10049875...........rect..........Pontiac/Chevy, aluminum Small port, race
-large port, race
+10051128...........rect..........Bowtie, aluminum, 72cc chamber, symmetrical ports
-10049875...........rect..........Pontiac/Chevy, aluminum
+10051129...........rect..........Bowtie, aluminum "raw" casting, symmetrical ports
-Small port, race
-10051128...........rect..........Bowtie, aluminum, 72cc chamber,
-symmetrical ports
-10051129...........rect..........Bowtie, aluminum "raw" casting,
-symmetrical ports
 10052902...........oval...OPEN...Mark IV, 427T
 10101140...91-up...oval..CLOSED..Gen. 5 366T, 427T
@@ Line 757: / Line 700: @@
 10141279...96-up...oval..CLOSED.."Vortec 7400", 100cc chambers
 10487052...77-90...oval...OPEN...366T
-12363391...96-up...oval...OPEN...Bowtie, aluminum, Signature Series,
+12363391...96-up...oval...OPEN...Bowtie, aluminum, Signature Series, fits Mark IV, Gen. 5, Gen. 6, 110cc chamber
-fits Mark IV, Gen. 5, Gen. 6, 110cc chamber
+12363401...96-up...rect...OPEN...Bowtie, aluminum, Signature Series, fits Mark IV, Gen. 5, Gen. 6, 118cc chamber
-12363401...96-up...rect...OPEN...Bowtie, aluminum, Signature Series,
-fits Mark IV, Gen. 5, Gen. 6, 118cc chamber
 12558162...01-up...oval..CLOSED..Gen. 7, "Vortec 8100", 8.1L, 496, truck
 12560241...98-up...oval..CLOSED.."Vortec 7400", 100cc chamber
@@ Line 766: / Line 707: @@
 12562933...91-95...oval...OPEN...Gen. 5, 118cc chamber
 12562934...00-up...rect...OPEN...Gen. 6, 502 marine
-14011077...69-up...rect...OPEN...aluminum, fits Mark IV, "C-port",
+14011077...69-up...rect...OPEN...aluminum, fits Mark IV, "C-port", 118cc chamber, also sold as a "solid" head
-cc chamber, also sold as a "solid" head
+14044861...84-96...rect..........Bowtie, aluminum, Mark IV, "raised runner", 1st. design, 105cc chamber
-14044861...84-96...rect..........Bowtie, aluminum, Mark IV, "raised runner",
+14044861...96-up...rect..........Bowtie, Aluminum, Signature Series, fits Mark IV, Gen. 5, Gen. 6, "raised runner",
-st. design, 105cc chamber
+nd. design, 115cc chamber
-14044861...96-up...rect..........Bowtie, Aluminum, Signature Series,
+14044861...84-96...rect..........Bowtie, aluminum, Mark IV, "raw" casting of "861" Mark IV 1st. design
-fits Mark IV, Gen. 5, Gen. 6, "raised runner", 2nd. design, 115cc chamber
-14044861...84-96...rect..........Bowtie, aluminum, Mark IV, "raw" casting
-of "861" Mark IV 1st. design
 14081045...78-87...oval...OPEN...454
 14081052...85-87...oval...OPEN...366T, 427T, 454 Truck, marked "HiPerf"
 14092359...86-90...oval...OPEN...366T, 427T, marked "HiPerf"
 14092360...86-90...oval...OPEN...454 truck, "peanut" round ports
-14096188...70-71...rect...OPEN...454 service replacement, also used on
+14096188...70-71...rect...OPEN...454 service replacement, also used on later Mark IV LS-6, LS-7 and 454 HO crate
-later Mark IV LS-6, LS-7 and 454 HO crate motors, 116cc chamber
+motors, 116cc chamber
 14097088...91-up...rect...OPEN...Gen. 5, 454/502 HO, 118cc chamber
-24502585...97......rect..........Olds/Chevy, DRCE 2, Pro Stock aluminum,
+24502585...97......rect..........Olds/Chevy, DRCE 2, Pro Stock, aluminum, for blocks w/4.900" bore spacing
-for blocks w/4.900" bore spacing
+25534404...04......rect..........Olds/Chevy, DRCE 3, Pro Stock, aluminum, for blocks with 4.900" bore spacing
-25534404...04......rect..........Olds/Chevy, DRCE 3, Pro Stock, aluminum,
-for blocks with 4.900" bore spacing
 </pre>
-===Other Mortec info===
+===Mortec SBC crankshaft casting numbers===
-<pre>CHEVY SMALL BLOCK CRANKSHAFT CASTING NUMBERS:
+====2-piece rear main seal====
+<pre style="border:none;">
+CHEVY SMALL BLOCK CRANKSHAFT CASTING NUMBERS:
 WITH 2-PIECE REAR MAIN OIL SEAL
@@ Line 833: / Line 771: @@
 3951130....327.......forged..medium journal...3.25" stroke
 3951529....400.......cast....large journal....3.75" stroke
+</pre>
+====1-piece rear main seal====
+<pre style="border:none;">
 WITH 1-PIECE REAR MAIN OIL SEAL
 10168568...265.......cast....medium journal...3.00" stroke
 12552215...364.......cast....medium journal...3.62" stroke, Gen. 3, 6.0L
-12552216...325,350,364.......cast....medium journal...3.62" stroke,
+12552216...325,350,364.......cast....medium journal...3.62" stroke, Gen. 3 5.7L LS1, 5.3L, 6.0L
-Gen. 3 5.7L LS1, 5.3L, 6.0L
 12553312...293.......cast....medium journal, 3.27" stroke, Gen. 3, 4.8L
 12553482...293.......cast....medium journal, 3.27" stroke, Gen. 3, 4.8L
@@ Line 846: / Line 786: @@
 14088535...305,350...cast....medium journal...3.48" stroke
 14088552...350.......forged..medium journal...3.48" stroke
 ZR1, "LT5", 350 DOHC
 10106122...350.......forged..large 2.76" journal...3.66" stroke
+</pre>
+===Mortec BBC crankshaft casting numbers===
-CHEVY BIG BLOCK CRANKSHAFT CASTING NUMBERS:
+====3.76" stroke 2-piece rear main seal====
+<pre style="border:none;">
-.76" STROKE WITH 2-PIECE REAR MAIN OIL SEAL
+Used in 1965-'90 Mark IV 366T, 396, 402, 427 and 427T
-Used on '65-'90 Mark IV 366T, 396, 402, 427 and 427T
 .......396,402,427...forged, 1053 steel
@@ Line 877: / Line 817: @@
 3965746..........semi- finished, forged
 3993804..........raw, 5140 steel
+</pre>
-.76" STROKE WITH 1-PIECE REAR MAIN OIL SEAL
+====3.76" stroke 1-piece rear main seal====
-Used on '91-up Gen. 5 and Gen. 6, 366T, 427T
+<pre style="border:none;">
+Used in 1991-up Gen. 5 and Gen. 6, 366T, 427T
 10114186...427T...forged, 1053 steel
 10114187...366T...cast
 10114189...427T...cast
+</pre>
+====4.00" stroke 2-piece rear main seal====
-.00" STROKE WITH 2-PIECE REAR MAIN OIL SEAL
+<pre style="border:none;">
-Used on '70-90 Mark IV 454 or Mark IV 502
+Used in 1970-90 Mark IV 454 or Mark IV 502
 .......454...forged, cross-drilled, 1053 steel
@@ Line 909: / Line 852: @@
 3993878....454...forged
 10051169...454...forged raw casting
+</pre>
-.00" STROKE WITH 1-PIECE REAR MAIN OIL SEAL
+====4.00" stroke 1-piece rear main seal====
-Used on '91-up Gen. 5 and Gen. 6 454 or 502
+<pre style="border:none;">
+Used in 1991-up Gen. 5 and Gen. 6 454 or 502
 10114188...454......cast
 14097044...454, 502..forged, 1053 steel
+</pre>
+===348/409/427 W-engine block casting numbers:===
-/409/427 W-ENGINE BLOCK CASTING NUMBERS:
+<pre style="border:none;">
 3732755.....348......59-61
@@ Line 938: / Line 884: @@
 3860386.....409......62-64
 3860387.....348......58
+</pre>
+===348/409/427 W-engine block casting numbers:===
-/409/427 W-ENGINE HEAD CASTING NUMBERS:
+<pre style="border:none;">
 3732791.....348......58-60
 3758379.....348......59-61...250 hp
@@ Line 958: / Line 904: @@
 3837731.....427......63......"Z11" (4.312" bore x 3.65" stroke)
 3852583.....409......63-65...HiPerf, 2.19"/1.72" valves
+</pre>
-CHEVY 348/409/427 W-ENGINE CRANKSHAFT CASTING NUMBERS:
+===348/409/427 W-engine crankshaft casting numbers:===
+<pre style="border:none;">
 3732692...348...forged...3.25" stroke
 3733223...348...forged...3.25" stroke
@@ Line 972: / Line 919: @@
 3837466...409,427 "Z11"...forged...3.65" stroke
 3838416...409...forged...3.50" stroke
+</pre>
+===SBC bore and stroke===
-CHEVY SMALL BLOCK BORE AND STROKE
+<pre style="border:none;">
 = 3.671" x 3.10" (Gen. 1, 5.7" rod)
 = 3.750" x 3.00" ('55-'57 Gen. 1, 5.7" rod)
@@ Line 985: / Line 932: @@
 = 3.736" x 3.48" (Gen. 1, 5.7" rod)
 = 3.875" x 3.25" (Gen. 1, 5.7" rod)
-= 3.779" x 3.622" ('99-later, Gen. 3, "LM7", "LS4 front wheel drive V8"
+= 3.779" x 3.622" ('99-later, Gen. 3, "LM7", "LS4 front wheel drive V8" 5.3L Vortec, 6.098" rod)
-.3L Vortec, 6.098" rod)
 = 4.000" x 3.25" (Gen. 1, 5.7" rod)
 = 3.893" x 3.622" ('97-later, Gen. 3, "LS1", 6.098" rod)
 = 4.000" x 3.48" (Gen. 1, 5.7" rod)
 = 4.000" x 3.48" ('96-'01, Gen. 1, Vortec, 5.7" rod)
-= 3.900" x 3.66" ('89-'95, "LT5", in "ZR1" Corvette 32-valve DOHC,
+= 3.900" x 3.66" ('89-'95, "LT5", in "ZR1" Corvette 32-valve DOHC, 5.74" rod)
-.74" rod)
 = 4.000" x 3.622" ('99-later, Gen. 3, "LS2", "LQ4" 6.0L Vortec, 6.098" rod)
 = 4.065" x 3.622" (2007-later, Gen. 4, "L92", Cadillac Escalade, GMC Yukon)
@@ Line 1,000: / Line 945: @@
 Two common, non-factory small block combinations:
-= 4.155" x 3.48" (5.7" or 6.00" rod) 400 block and a 350 crank with
+= 4.155" x 3.48" (5.7" or 6.00" rod) 400 block and a 350 crank with "spacer" main bearings
-"spacer" main bearings
+= 4.030" x 3.75" (5.565" or 5.7" or 6.0" rod) 350 block and a 400 crank, main bearing crank journals cut to 350 size
-= 4.030" x 3.75" (5.565" or 5.7" or 6.0" rod) 350 block and a 400 crank,
+</pre>
-main bearing crank journals cut to 350 size
-CHEVY BIG BLOCK V8 BORE AND STROKE
+===BBC bore and stroke===
+<pre style="border:none;">
 T (tall deck) = 3.935" x 3.76"
 = 4.096" x 3.76"
@@ Line 1,019: / Line 962: @@
 ALL production big blocks used a 6.135" length rod.
+</pre>
+===348-409 W-engine bore and stroke===
-CHEVY 348-409 V8 BORE AND STROKE
+<pre style="border:none;">
 = 4.125" x 3.25" (6.125" rod)
 = 4.312" x 3.50" (6.010" rod)
 = 4.312" x 3.65" (6.135" rod), 1963 "Z11" SHP drag race
+</pre>
+===SBC crankshaft journal sizes===
-CHEVY SMALL BLOCK CRANKSHAFT JOURNAL SIZES
+<pre style="border:none;">
 Gen. 1, "Small Journal"
 ...Mains- 2.30", Rods- 2.00"
@@ Line 1,035: / Line 978: @@
 ...Mains- 2.30", Rods- 2.00"
 ...Mains- 2.30",  Rods- 2.00"
 Gen. 1, "Medium Journal", includes Vortec 305 and 350 through '98
@@ Line 1,045: / Line 987: @@
 ...Mains- 2.45", Rods- 2.10"
 ...Mains- 2.45", Rods- 2.10"
 Gen. 1, "Large Journal"
@@ Line 1,069: / Line 1,010: @@
 Corvette "ZR1", DOHC, "LT5"
 ...Mains- 2.76", Rods- 2.10"
+</pre>
-CHEVY BIG BLOCK CRANKSHAFT JOURNAL SIZES
+===BBC crankshaft journal sizes===
+<pre style="border:none;">
 T
@@ Line 1,080: / Line 1,022: @@
 ALL Chevy big blocks used Mains- 2.7488"-2.7495", Rods- 2.20"
+</pre>
-CHEVY W-ENGINE CRANKSHAFT JOURNAL SIZES
+===W-engine crankshaft journal sizes===
+<pre style="border:none;">
@@ Line 1,088: / Line 1,031: @@
 All W-motors used Mains- 2.50", Rods- 2.20"
 </pre>
 [[Category:Identification and decoding]]
 [[Category:Engine]]
 [[Category:GM]]

Identifying Chevy engines

Revision as of 04:32, 25 January 2013

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