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Head Casting Numbers: Chevrolet Small Block Engines
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16th of February, 2007
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Chevrolet Small Block Head Casting Numbers
Casting # Combustion Chamber Size (CCs) Intake Valve Exhaust Valve Production Years Misc. Engine Size (ci)
10033867 62cc 2.02 1.60   over the counter 23 degree, angle plug, 196cc intake runner, aluminum  
10045434 55 cc       Over the counter 15 degree, angle plug, raised runner, aluminum  
10051101 55 cc 2.02 1.60   Bowtie, Aluminum angle plug, raised runner, 196cc intake ports  
10065202 cc 1.94 1.50 1987-95   350
10065203 cc 1.94 1.50 1987-95   350
10065204 cc     1987-65   350
10065205 cc     1987-95   305
10065206 cc     1987-95   350
10065207 cc     1987-68   305
10088113 58 cc 1.94 1.50 1988-up angle plug, "D" exhaust ports 350
10093328 61 cc       Pontiac 15 degree heads, aluminum, 224cc ports.  
10106178 cc     1990 LT5, ZR-1, DOHC 32-valve, aluminum. 350
10106179 cc     1990 LT5, ZR-1, DOHC 32-valve, aluminum 350
10110810 cc     1993-up Gen. 1 350
10120928 cc     1987-95   350
10125320 cc     1994-96 Gen.2 LT1, cast iron 350
10128374 68cc     1992-up Gen. 2 LT1, reverse flow, 175cc intake ports, 68cc exhaust ports 350
10129552 cc     1987-95   350
10134352 45cc       Bowtie Low port, angle plug, 18 degree, 223cc intake port, race heads  
10147898 cc     1995-96 Gen. 1 crate motor 350
10159550 cc     1987-95   350
10159551 cc     1987-95   305
10159553 cc     1987-65   305
10174389 cc     1991-94 LT5, ZR-1, DOHC 32-valve, aluminum 350
10174390 cc     1991-95 LT5, ZR-1, DOHC 32-valve, aluminum 350
10185040 45cc       Bowtie, symmetrical ports, 263cc intake ports, splayed valves  
10185040 45cc       Bowtie, 2nd version symmetrical ports, 240cc intake ports, splayed valves  
10205245 cc     1993 Gen. 2 LT1, Reverse flow, 175cc intake ports, 68cc exhaust ports 350
10207643 cc     1994-96 Gen. 2 LT1, Reverse flow, 175 intake ports, 68cc exhaust ports 350
10215339 cc     1997 Gen. 3 "LS1" 350
10225121 cc     1994-95 LT5, ZR-1, DOHC 32-valve, aluminum 350
10225122 cc     1995 LT5, ZR-1, DOHC 32-valve, aluminum 350
10239902 54.4cc     1996-up Gen. 2 LT4, Reverse flow, 195cc intake, angle plug. 350
10239906 64cc 1.94 1.50 1996-up Vortec 5700, L31, 170cc intake ports. 350
12367712 62cc 2.00 1.55 1999-up Fast burn, aluminum, 210cc intake ports.  
12367713 62cc 2.00 1.55 1999-up Fast burn, used on ZZ430 crate engine, aluminum 210cc intake ports.  
12480005 38cc 2.125 1.625 2000 LS1, GTZ, Aluminum,  
12480011 48cc     1997-up Bowtie SB2.2, 2nd version of SB2, mirror ports, revised valve, angle plug location  
12506450 cc     1987-95   350
12509859 cc     1987-94   305
12516852 cc     1987-95   350
12551561       1996 Gen. 2 LT1 350
12552520 cc     1997-up Vortec truck 350
12554290 cc     1994-96 Gen. 2 LT1 350
12555690 cc     1996 Gen. 2, LT4 350
12558059 64cc 1.84 1.50 1997 Vortec, truck 350
12558062 64cc 1.94 1.50 1998 L31 Vortec truck, 170cc intake ports. 350
12558806       1997-98 Gen 3 LS1 Aluminum 350
12559853       1999 Gen 3 LS1 Aluminum 350
14008856       1979-81   267
14010201       1982-85   305
14010516       1980-86   350
14011034 64cc 2.02 1.60 1980 Bowtie, 184cc intake ports, angle plug, Phase 2 heads 350
14011049 55cc 2.02 1.60 1982 Bowtie, aluminum, angle plug, 180cc intake ports  
14011083 64cc 1.94 1.50 1985-86 Crate motor, 285/300hp  
14014415   1.72 1.50 1980-85   267/305
14014416 58cc 1.84 1.50 1980-86   305
14014440 58cc 1.84 1.50 1980   305
14019821       1980-86   350
14019924       1979-81   267
14019926       1980-86   350
14020517       1980   350
14020555       1981   305
14020556       1981   350
14022056       1981-85   350
14022206       1980   350
14022301       1980-86   305
14022601 58cc 1.84 1.50 1980-86   267/305
14022801   1.72 1.50 1980-86   305
14034806       1978-82   267
14034808       1980-86   350
14034808 73cc 1.94 1.50 1996-up Gen 1 Goodwrench 350
14034810       1980-86 truck 350
14034811       1980-86 truck 350
14039122       1981-86 truck 305
14039121       1981-86 truck 305
14071114       1980-86   350
14075381       1980-86 truck 350
14079261       1986   350
14085844       1980-86 truck 350
14085963       1986 350 350
14089119       1986-88   350
14094093       1986-88   350
14094093       1986-88   350
14094093       1986-88   350
14096217 64cc     1985-86 Crate motor, 285/300hp 350
14101081       1987-95   305
14101083 64cc     1987-up Gen 1, also used on crate motor 350
14101128 58cc     1986-87 Aluminum, angle plug 350
14102187 58cc 1.84 1.50 1987-91   305
14102191       1987-up   305
14102193       1987-up   350
1816887 60cc 1.72 1.50 1963 Made in Canada 283
24502559       1996-97 Bowtie, SB2, 1st. version, mirror ports, aluminum, 196cc ports.  
25500141 42cc 2.10 1.625   Buick, Chevrolet aluminum 10-degree heads, 235cc intake ports.  
3986316 76cc 1.94 1.50 1971-72   350
330545 76cc 2.02 1.60 1973   350
333881 76cc 2.02 1.60 1974-75   350
333882 75cc 1.94 1.50 1974-80   350/400
340292 64cc 2.02 1.60 70s angle plug head  
354434 60cc 1.72 1.50 1975-79   262/267/305
358741 76cc 1.72 1.50 1976-79   305
3636839 cc 1.72 1.50 1955   265
3703523 67cc 1.72 1.50 1955   265
3713358 cc 1.72 1.50 1955-56   265
3713569 cc 1.72 1.50 1955-56   265
3725306 56cc 1.72 1.50 1956 Corvette head 265
3731539 60cc 1.72 1.50 1957 Corvette 283 hp 283
3731554 70cc 1.72 1.50 1957-62   283
3731556 cc 1.72 1.50 1957 Made in Canada 283
3731762 56cc 1.72 1.50 1956 Corvette 2x4 Carbs 265
3731544 60cc 1.72 1.50 1957-61 Corvette 283
3737775 75cc 1.72 1.50 1962-67   283/327
3740997 76cc 1.94 1.60 1957 1x4, 2x4, fuel injected Corvette 1957
3743096 cc 1.72 1.50 1962-67   327
3747363 cc 1.72 1.50 1957-61   283
3747460 69cc 1.72 1.50 1959-67   283/327
3748770 60cc 1.72 1.50 1955-62 1x4, 2x4 fuel injected Corvette 265/283
3748772 69cc 1.72 1.50 1957-65 1x4, 2x4 fuel injected Corvette 283
3755537 69cc 1.72 1.50 1957-62 2 Brl 283
3755549 60cc 1.72 1.50 1957-62 Car and truck, 2 bbl 283
3755550 60cc 1.72 1.50 1957-62 1x4, 2x4 fuel injected Corvette 283
3755539 60cc 1.72 1.50 1958-62 truck 283
3755585 cc 1.72 1.50 1962-67 truck 327
376450 76cc 1.72 1.50 1975-81 6 or 7 exhaust bolt holes 262/267/305
376455 75cc 1.72 1.50 1980-84   350
3767462 62cc 1.94 1.50 1962-67   327
3767465 60cc 1.72 1.50 1959-61 1x4, 2x4 fuel injected Corvette 283
3767754 60cc 1.72 1.50 1959-61   283
3767792 cc 1.72 1.50 1960-64   283
3770126 cc 1.94 1.50 1967-70   327/350
3774682 69cc 1.72 1.60 1960-67   283/327
3774684 75cc 1.72 1.50 1962-64   327
3774692 60cc 1.72 1.50 1958-64 1x2, 2x4 fuel injected Corvette 283
3782461 62cc 2.02/1.94 1.60/1.50 1961-70 Camel hump heads, no accessory holes 160cc intake runners 302/327/350
3782461x 64cc 1.94 1.50 1960-63 Camel hump heads, no accessory holes 172cc intake runners 283/327
3795896 60cc 1.72 1.50 1958-72   283/307/327
3798996 cc 1.72 1.50 1963-67   327
3814482 75cc 1.72 1.50 1962-67   283/327/350
3817680 cc 1.72 1.50 1959   283
3817681 cc 1.72 1.50 1962-67   327
3817682 cc 1.72 1.50 1961-62   283
3836839 cc 1.72 1.50 1955   265
3836842 cc 1.72 1.50 1957-67   265/283
3837064 67cc 1.72 1.50 1958-62   265/283
3837065 cc 1.72 1.50 1955-56 truck 265
3837775 75cc 1.72 1.50 1962-67   283/327
3848720 cc 1.72 1.50 1957-58   283
3854520 61cc 1.72 1.50 1962-67   283/327
3874480 69cc 1.72 1.50 1960-67   238/327
3884520 60.5cc 1.72 1.50 1960-67 Some marked "Made in Canada" also used by Studebaker 283
3890462, 3891462 63.3cc 2.02,1.94 1.60,1.50 1962-68 Camel hump heads, no accessory holes 302/327/350
3901068 64cc 1.94 1.50 1987-up Crate motor, 285 HP 350
3911032 70cc 1.72 1.50 1968-70   307/327
3912264 cc 1.72 1.50 1958-62 car, truck 283
3912265 cc 1.72 1.50 1963-64   283
3912311 cc 1.72 1.50 1965-67   327
3912313 cc 1.72 1.50 1965-67   327
3917264 cc 2.02 1.60 1967 Z-28 Camaro 302
3917290 cc 1.72 1.50 1967-70 truck 307/327
3917291 63cc 2.02,1.94 1.60,1.50 1962-69 Camel hump heads, no accessory holes 302/327/350
3917292 64cc 2.02 1.60 1967-69 Corvette 350 hp camel hump 327/350
3917293 75cc 1.72 1.50 1968-69   307/327
3927185 70cc 1.72 1.50 1968-76   307/327/350
3927186 63cc 2.02,1.94 1.60,1.50 1968-72 Camel hump, no accessory holes 302/350
3927187 64cc 2.02 1.60 1969-70 Camel hump heads, no accessory holes 350
3927188 75cc 1.72 1.50 1969-70   307/327
3931633 cc 1.72 1.50 1968-73   307
3931635 cc 1.94 1.50 1968-76   350
3931638 cc     1968 truck 327
3932441 76cc 1.94 1.50 1967-79 152 cfm runners 327/350
3932441x 80cc 1.94 1.50 1969-70   350/400
3932454 cc     1968-79 truck 307/350
3946812 cc 1.94 1.50 1969   350
3946813 cc 1.94 1.50 1969-79 truck 350
3947040 63.3/64cc 2.02/1.94 1.60/1.50 1968-70 Rig angel casting identifier, good HP head used in trucks, no accessory holes 302/327/350/
3947041 63/64cc 2.02/1.94 1.60/1.5 1968-79 Right angel casting, good HP head used in trucks, no accessory holes 1968-79
3961598 76cc 1.94 1.50 1970-76   400
3964286 cc     1968-77   350
3965742 cc     1970 over the counter angle plug   350
3970126 75cc 1.72 1.50 1967-79 148.3 intake cfm, 87.9 ex cfm 327/350
397041x 64cc 2.02 1.60 1969-70 right angle casting identifier. 1969-70
3973370 64cc 1.94 1.50 1969-70 over the counter, angle plug.  
3973414 64cc 2.02 1.60 1970 LT1-370hp, camel hump heads 350
3973487 75cc 2.02/1.94 1.60/1.50 1968-79 used on 71-72 LT1 350
3973487x 75cc 2.02/1.94 1.60/1.50 1698-73 Corvette LT1 350
3973493 76cc 1.94 1.50 1970-76 143.6 cfm intake, 87.2 cfm exhaust 400
3986339, and X 74.5cc 1.72 1.50 1968-79 car, truck 307/350
398633x 76cc 1.94 1.50     350
3986388 cc 1.72 1.50 1968-79 truck 350
3991492 64cc 2.02/1.94 1.60/1.50 1968-73 LT1, camel hump heads, accessory holes, straight or angle plug 327/350
3998916 76.2cc 2.02 1.60 1972-75 Corvette LT1, screw in studs 350
3998920 cc 1.94 1.50 1972-75   350
3998991 74.5cc 1.72 1.50 1968-79   307/350
3998993 75cc 1.94 1.50 current Goodwrench crate motor 350
3998993 75cc 1.94/1.72 1.50 1698-79 150.8 cfm intake, 91.1 cfm exhaust 307/350
3998997 76cc 1.94 1.50 1971-73   350/400
4079261 cc 1.94 1.50 1975   350
462624 76cc 1.94 1.50 1975-86   350/400
468642 75cc 1.72 1.50 1975-84   350/400
471513 cc 1.72 1.50 1979-81   267
517513 cc 1.72 1.50 1979-81   267
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