SBC Head Casting Numbers: Full List & Lookup

Casting numbersYearsC.I.D.ValvesChamber SizeNotes
17645075-76262 - 3051.71 / 1.5
330545733502.02/1.6076cc
33086271-734001.94/1.50
33086470-81366/427/4542.06/1.77Open chamber Oval port
33086570-84366/427/4542.06/1.77Open chamber Oval port
33086668-78366/427Oval Port Open chamber
33086768-73427Oval Port Open chamber
33388174-753502.02/1.6076cc
33388274-80350/40076cc
33676873-76427Oval Port Open chamber
33678173-854542.06/1.77113cc Oval port
34029270's64ccangle plug, over the counter
34377168-85366/427/4542.06/1.77Open chamber Oval port
34377276-84366/427/4542.06/1.77Open chamber Oval port
34378375-784542.06/1.77Open chamber Oval port
34623675-874542.06/1.77113cc Oval port
34623875-874542.06/1.77113cc Oval port
35262570-76454Oval Port Open chamber
35304970-734542.06/1.77113cc Oval port
35443475-79262/267/30560cc
35874176-79305
35994471-793501.94/1.5076cc
36676573-84427/4542.06/1.77Open chamber Oval port
36745075-76262
37644577-8535076cc
37645075-81262/267/30560cc6 or 7 exhaust bolt holes
37645577-85350
376495793501.94/1.5076cc
38388271-73400
39938070-7340076cc
42642472-82305/350/4001.72/1.50
45862469-843501.94/1.5076cc
45864275-84350
46070378-803501.94/1.5076cc
46261477-7930560cc
46262475-86350/4001.72/1.50;
194/1.50;
2.02/1.60
76cc
46403376-863501.94/1.5076cc
46403676-863501.94/1.5076cc
46864276-up350/400
47151379267/350
47242476-793051.72/1.50
47332868-853662.06/1.77Open chamber Oval port
47421378-823051.72/1.50
47421478-823501.94/1.5076cc
47559078-824001.94/1.5076cc
51751379267/350
181688763283Made in "Canada" GMC Truck
3030817744002-bolt
323888268-693501.94/1.5076cc
329718557-67307/327/3501.72/1.50
339163568-76305
363683955265
3703523552651.72/1.50195HP
370352455265
371335855-56265
371356955-56265
372099156-57265
372530656265
372718569-73307
3731262562651.72/1.50Dual Quad Corvette
373153957283283 HP FI
373154457-61283
373154857-62283
373155457-62283
373155657283Made in "Canada" Truck
373176256265Vette 2x4 Carbs
373279158348
373746560-61283
373773957-62283283 and 283 Corvette F.I.
373777562-67283/327
3740997572831.72/1.50Dual Quad FI & 4-brl 220-270HP
374305658283
374309662-67327GMC Truck
374736357-61283
374746059-67283/32770cc
374805662-673271.72/1.50
374872057-582831.72/1.50Dual Quad FI & 4-brl Corvette
374877058283
374877258-61283
375553757-62283
3755538592831.72/1.50250-290HP FI Corvette
375553958-62283
375554957-62283
375555059283
375558562-67327GMC Truck
375589662-642831.72/1.50
375651957-62283283 and 283 Corvette F.I.
375837959-61348
375925658348
3760116592831.72/1.50Dual Quad FI & 4-brl Corvette
376746059-60283
376746262-67327
376746559-61283
376773859-61348
376775459-6128360cc
376779260-64283
377012667-70327/3501.94/1.50
3773012552651.72/1.50
377463464-673271.72/1.50
377468260-64283/32770cc
377468462-6432775cc
3774690582831.72/1.50FI Corvette
377469258-6428360cc
377643464-67327
378114760-61348High Perf
378246164-6632762ccCamel hump, no accessory holes, 160/62cc port volumes
3782462673271.94/1.50Corvette 2.02/1.60
378287062-67327327 and 327 Corvette
378287962-67327327 and 327 Corvette
378981762-67327327 and 327 Corvette
378993557-62283
379072164-67283
379256365-67327
379558661409360HP
379589358-72283 - 307 - 327
379589663-6528360cc
379689664-672831.72/1.5060ccChevy II
379899663-67327
3814462673501.94/1.50
381448060-67283/3271.72/1.5070cc
381448262-67283/327/35075cc
381469062-64409High Perf
381768063-67283/327
381768162-67327
381768261-62283
381933362-65348/409
383081763-65409340HP
383683955265
383684257-67283/327
383692463-642831.72/1.50
383694258-622831.72/1.50
383706358-622831.72/1.50
383706456-62265/283
383706555-56265Truck
383773163409High Perf Z-11
383773957283283 and 283 truck
383777562-67283/3271.72/1.50
384872057-58283
3849820653271.72/1.50
384985257-67283
384993565-67283
385217262-64327
385258365409400HP
385452062-67283/3271.72/1.50
385596168-763502-bolt
385620665-663962.06/1.7798cc Oval port
3856208653962.06/1.77109ccZ-16/L-37 Rectangular port
385621366-703662.06/1.77Closed chamber Oval port
385626068396Oval Port Closed chamber
385817465-67327
386481257-67283283 and 283 truck
386780257-602831.72/1.50FI Corvette
387270266396/4272.06/1.7798cc Oval port L-34/L-35/L-36
387306456-572651.72/1.50
387385866-67396/4272.06/1.77109cc L-78/L-72 Rectangular port
387613262-67327327 and 327 Corvette
387648771-733501.94/1.5076cc
387677560-67283/32775cc
387687566-704272.06/1.77Closed chamber Oval port
387877564-673271.72/1.50
388452060-6728360ccSome marked "Made in Canada", also used by Studebaker
389046266-67302/327/35064ccCamel hump, no accessory holes
389146262-67302/327/3501.94/1.50 2.02/1.6064cc
389149264-673271.94/1.50
389265765-67327
389694465-67283
390106887-up35064ccCrate motor, 285HP
390439066-67396/4272.06/1.7798cc Oval port L-34/L-35/L-36
390439165-67396/4272.06/1.77107cc L-78/L-71/L-72 Rectangular port
3904392674272.19/1.88106cc L-88/L-89 Aluminum Rectangular port
390439366-683662.06/1.77Closed chamber Oval port
390895267427Oval Port Open chamber
390980266-67396/4272.06/1.77100cc Oval port L-34/L-35/L-36/L-68
391101168327
391103268307/32770cc
391226458-62283
391226563-64283
391229168-70302/327/3501.94/1.50 2.02/1.6064ccDoubble humps
391231165-67327
391231365-67327
391463668-73307
391466068-69327327 and 327 Corvette
391467868-69327327 and 327 Corvette
391721567-69396/4272.06/1.77100cc Oval port L-34/L-35
391721966-70366/4272.06/1.77Closed chamber Oval port
3917264673022.02/1.6064cc Z-28
391729067-68307/327
391729167-68302/327/35064ccCamel hump, no accessory holes
391729268327/35064ccCamel hump
391729367-68307/32775cc
391984067-69396/4272.06/1.77107cc L-78/L-71/L-72 Rectangular port
391984268-69396/4272.19/1.88106cc L-88/L-89 Aluminum Rectangular port
3921175663271.94/1.50
392344167-763501.94/1.5076cc
392718569-76307/327/35070cc
392718669-70302/35064ccCamel hump, has accessory holes
392718769-7035064ccCamel hump, has accessory holes
39271886932774cc
3928454683071.72/1.50
392845568302/3272.02/1.6064cc 325 & 350HP
3928494683272.02/1.6064cc350HP 4-brl
3928495683271.72/1.50
393106369-70396/4272.06/1.77100cc Oval port L-34/L-35
393163368-73307
393163568-76350
393163768-69327
393163868327Truck
3931639683022.02/1.6064cc
393237368-73307
393238668-76327 - 350350 4-bolt and 327 Corvette
393238868-763502-bolt
393244169-7035076cc
393245469-73307
393288276400
393314868-7335076cc
393314969-704272.06/1.77122cc Oval port
393540168-76427Oval Port Open chamber
3941174683271.72/1.50
394607469-71396/4542.19/1.88118cc L-88/ZL-1 Aluminum Rectangular port
394681269350
394681369-79350Truck
394701468-70350
39470406832764ccRight angle casting identifier, good HP head, used in trucks, no accessory holes
394704169-70302/35064ccRight angle casting identifier, accessory holes, good HP head
3951509744002-bolt
395151170-734004-bolt
39515987040076cc
395661868-763504-bolt
395861868-763502-bolt
396159870-764001.94/1.5076cc
396428066-70427/4542.06/1.77Closed chamber Oval port
3964286350
396429069-70396/402/427/4542.06/1.77100cc Oval port
396429169-70396/402/427/4542.19/1.88108cc L-78/L-71/L-72/LS-6 Rectangular port 325cc intake
3964292704542.19/1.88109cc LS-6 Rectangular port
3965198693962.06/1.77Open chamber Oval port
396574270350over the counter, angle plug L98 style
397001068-763504-bolt
397002068-73307
397012667-71327/350
397072164-67283
397129368-69307 - 327
397319571-734001.94/1.5076cc
397337069-7035064ccover the counter in US, Canadian 350/300hp production use in Pontiac, straight or angle plug
39734147035064ccCamel Hump, LT1-350/370hp
397348771-723501.94/1.5;
2.02/1.6
75ccwas also used on '71 350/330hp LT1
397349371-7240076cc
397595068-70366/4272.06/1.77Closed chamber Oval port
398146262-67302-327-350
398613370-85366/4272.06/1.77Closed chamber Oval port
398613670-84366/4272.06/1.77Closed chamber Oval port
39863167135076cc
398633069-793501.94/1.5076cc
39863367135076cc
398633971307/35074cc
398638868-76307/350
399094168-82307/350
39914927035064ccLT1, Camel hump, accessory holes, straight plug
399382071402/4542.06/1.77113cc Oval port
3994025714542.19/1.88118cc LS-6 Rectangular port
3994026714542.19/1.88118cc LS-6 Rectangular port
3997417713071.72/1.50
39989167235076ccalso used w/'72 350 LT1, big valve, screw in studs
399892072-73350
399899172-73307/35075cc
399899372-73307/35075cc
399899772-73350/40076cc76cc chambers
399924172402/4542.06/1.77113cc Oval port
407926175350
6258723714542.19/1.88118cc LS-6 Rectangular port
625942568-763502-bolt
625951573350
626085573-753501.94/1.5076cc
626085673-763501.94/1.5076cc
627207073350
627229271402/4542.06/1.77Open chamber Oval port
627299071-944542.19/1.88118cc Replacement Rectangular port 325cc intake
1003386762ccAluminum, over the counter Pontiac 23' head, angle plug, 196cc intake port
10045427Pontiac/Chevy Aluminum, 91cc chamber Large Rectangle Port
1004543455ccAluminum, Over the counter Pontiac 15' head, angle plug, raised runner, "rollover" head
10049875Pontiac/Chevy Aluminum Small Rectangle port
1005110155ccAluminum, Bowtie, angle plug, raised runner, 196cc intake port
1005112890-944542.19/1.8872cc Bowtie Aluminum Rectangular port 400cc intake
10052902427Oval Port Open chamber
1006520287-95350Truck
1006520387-95350Truck
1006520487-95350
1006520587-95305
1006520687-95350
1006520787-95305
1008811388-up350194/1.5058ccAluminum, angle plug, raised "D" port exhaust
1009332861ccAluminum, Over the counter Pontiac 15' head, 224cc ports, "roll over" head
1010113691-944542.06/1.77Open chamber Oval port
1010114091-01366/427Oval Port Closed chamber
1010617890350Aluminum, LT5, ZR1, DOHC, 32-Valve, pass. Side.
1010617990350Aluminum, LT5, ZR1, DOHC, 32-Valve, drivers Side.
1011081091-up35065ccGen. 1
1011415691-01454Oval Port Open chamber
1012092887-95350
1012103378-884542.06/1.77Open chamber Oval port
1012532094-96350Gen.II LT1, cast iron version, used on "9C1" Police package, Impala SS, Cadillac Fleetwood, Buick Roadmaster, reverse flow cooling
1012837492-up35053ccAluminum, Gen.II LT1, angle plug, reverse flow cooling, 175/68cc ports
1013435245ccAluminum, angle plug, "low" port, 223cc intake port, 18' race head
10134363This casting # has been used
in many different versions of this
aluminum 18' and 15' Bowtie race head.
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 6
different versions as of 11/99
1014127996-01454Vortec 7400 100cc chambers Oval Port
1014789895-98350Gen.I crate motor
1015955087-95350
1015955187-95305
1015955287-95350
1015955387-95305
1017438991-94350Aluminum, LT5, ZR1, DOHC, 32-Valve, pass. Side.
1017439091-95350Aluminum, LT5, ZR1, DOHC, 32-Valve, drivers Side.
1018504045ccAluminum, Bowtie, 1st version, symmetrical ports, 263cc intake ports, splayed valves
102052459335068ccAluminum, Gen.II LT1, reverse flow cooling, 175/68cc port volumes
1020764394-9635068ccAluminum, Gen.II LT1, reverse flow cooling, 175/68cc port volumes
1020889094-96265Gen.II, L99, 4.3 Liter V8, cast iron, reverse flow cooling
102153399735068ccAluminum, Gen.III, LS1,
1022512194-95350Aluminum, LT5, ZR1, DOHC, 32-Valve, Drivers Side.
1022512295350Aluminum, LT5, ZR1, DOHC, 32-Valve, Pass. Side.
1023990296-up35054.4ccAluminum, Gen.II LT4, reverse flow cooling, 195cc Intake port, angle plug.
1023990696-up3501.94/1.50Vortec 5700, "L31", 170cc Intake port
1048705277-90366Oval Port Open chamber
1235278379-934542.06/1.77Open chamber Oval port
12363391Oval Port Bowtie Aluminum Signature Series
12363401Rectangle Port Bowtie Aluminum Signature Series
1236771299-up2.00/1.5562ccAluminum, FastBurn, 210cc Intake port
1236771399-up2.00/1.5562ccAluminum, Fast Burn used on ZZ430 crate motor, 210cc Intake Port
1248000520002.125/1.62538ccAluminum, Ls1"GTZ", angle plug,
1248001197-up48ccAluminum, "SB2.2" 2nd version, "mirror ports" revised valve angles and plug location
124800342.02/1.60Bowtie Phase III 64cc Angle plug 184 cc intake runner
1250645087-95350
1250985987-94305
1251685287-95350
1252974295-96265Gen.II, L99, cast iron
1255156196350Aluminum, Gen.II, "LT1"
1255252097-up305Vortec, truck
1255429094-96350Gen.II LT1, cast iron version, used on "9C1" Police package, Impala SS, Cadillac Fleetwood, Buick Roadmaster, reverse flow cooling
1255429195-96265Gen.II, "l99" CAST IRON
1255569096350Aluminum, Gen.II, "LT4"
1255674399325Aluminum, Gen.III, 5.3L truck, van
12558059973051.84/1.50Vortec, truck
12558062983501.94/1.5068ccL31 Vortec, 170cc Intake port, truck
1255816201-up496Gen.VII Vortec 8100 8.1L truck
1255880697-9835068ccAluminum, Gen.III, "LS1"
1255985399-up35068ccAluminum, Gen.III, "LS1"
1255986299-00Aluminum, GEN.III, 4.8/5.3L
1255989500-up325Aluminum, Gen.III, Vortec, 5.3L
1256024198-01454Vortec 7400 100cc chambers Oval Port
12561706Aluminum, Gen.III, 5.3L
1256187399-0136471ccIron, Gen.III
1256231736471ccAluminum, Gen.III
1256293291-95454/502Oval Port truck crate motor 118cc chambers
1256293400-up502GenVI Marine
1256424100-up35068ccAluminum, Gen.III, "LS1"
1256424301-up350/364Aluminum, Gen.III, "LS6", "LS2"
1257203536471ccAluminum, Gen.III, 6.0L
1400885679-81267
1401020182-85305
1401051680-86350
1401103464ccIron, 184cc intake ports, angle plug, "Phase II head"
1401104955ccAluminum, 180cc intake port, angle plug, "Phase 6"
1401107789-944542.19/1.88118cc Replacement Aluminum Rectangular port 295cc intake
1401108355-863501.94/1.5064ccCrate motor for years indicated. 285/300HP
1401441580-85267/305
1401441680-863051.84/1.5058cc
14014440803051.84/1.50
1401982180-86350
1401992479-81267
1401992680-86350
1402051680-86305/3501.84/1.50
1402051780350
1402055581305
1402055681350
1402205685350
1402220680350
1402230180-86305
1402260180-86267/3051.72/1.50;
1.84/1.50
53cc
1402280180-86305
140248163501.94/1.5076ccGen.I crate motors
1402517583-934542.06/1.77Open chamber Oval port
1403480678-82267
1403480778-86305
1403480880-86350
1403481080-86350Truck
1403481180-86350Truck
1403912181-86305Truck
1403912281-86305Truck
1404486189-944542.19/1.88106cc Bowtie Aluminum Rectangular port 380cc intake
1407111480-86350
1407538180-86350Truck
1407926186350
1408104486-904542.06/1.77Open chamber Oval port
1408104578-87454Oval Port Open chamber
1408105285-87366/427/454Oval Port Open chamber
1408584480-86350Truck
1408596386350
14088526350Aluminum, Gen.II, LT1
1408911986-88350
1409235986-894272.06/1.77Open chamber Oval port
1409236085-894542.06/1.77Open chamber Oval port
1409409386-88350
1409618887-944542.19/1.88118cc Replacement Rectangular port 325cc intake
1409621755-8635064ccCrate motor, 285/300hp, 72' or 90' center intake manifold bolt angels
1409708889-up5022.19/1.88118cc Replacement Rectangular port 325cc intake GEN V
1410108187-95305
1410108387-up35064ccGen.I, also used on crate motors, 285/300hp, 72' center manifold bolt angle.
1410112886-8735058ccAluminum, angle plug
1410139886-904542.06/1.77Open chamber Oval port
1410218787-913051.84/1.50
1410218888- 93350 centerbolt
1410219187-up350
1410219387-up305/3501.94/1.50
22542525Aluminum, Dart/Olds/Chevy, 14' or 17' race head
2450255996-9738ccAluminum, Bowtie, "SB2", 1st version, "mirror ports", 196cc intake ports, CNC Version 280cc intake ports
24502585Olds/Chevy DRCE 2 Pro Stock aluminum
255001412.1/1.62542ccAluminum, Buick/Chevy, 10' race head, symmetrical ports, 235cc intake ports
3341736990-up35076ccGen.I Goodwrench crate motor, Hecho en Mexico
25534351C04-up2.00/1.55cast iron Vortec head, Gen.I Bowtie, 175/65cc ports, small port head
25534371C04-up2.00/1.55cast iron Vortec head, Gen.I Bowtie, 206/77cc ports, large port head
370r352355265
3740r997572832x4 & FI (exc.-283hp)
3782461X60-63283/32762ccCamel hump, no accessory holes, larger 172/64cc port volumes
3932441X69-70350/40080cc
3947041X69-70302/35064ccRight angle casting identifier, 165cc intake port, accessory holes, good HP head
3973487X71-723501.94/1.50;
2.02/1.60
75cc
3986336X7135076cc
3986339X71307/35074cc
1012955287-95350cc
387448060-67238/3271.72/1.5069cc
3890462, 389146262-68302/327/3502.02/1.60;
1.94/1.50
63.3ccCamel hump heads, no accessory holes
397041x69-701969-702.02/1.6064ccright angle casting identifier.
3986339, and X68-79307/3501.72/1.5074.5cccar, truck
398633x3501.94/1.5076cc

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