Chevrolet Head Casting Number Reference
Small Blocks
330545 350, 73, Corvette, 76cc, 2.02-1.6 valves
333881 350, 74-75, 76cc, 2.02-1.6 valves
333882 350-400, 74-80, 76cc, 160/60cc ports
340292 "Turbo" Over Counter Angle Plug, 64cc, 2.02-1.6 valves
354434 262-267-305, 75-79, 163/57cc ports LW casting
358741 305, 76-79
376450 262-305-350, 84-81, 168/60cc ports, 7 bolt ex.
376455 350, 77-85
458642 350-400, 67-70,
462624 350-400, 75-86, 161/62cc ports, 7 bolt ex.
468642 350-400, 76-up, small sparkplugs
471513 267,350, 79
517513 267,350, 79
3030817 400, 74
3636839 265, 55
3703523 265 Corvette, 55
3703524 265,55
3713358 265, 55-56
3713569 265, 55-56
3720991 265, 56-57
3731262 265, 56, 2x4 carb, Corvette
3725306 265, 56-57
3731539 57 Corvette FI
3731544 283, 57-61
3731548 283, 57-62
3731554 283, 57-61
3731556 283, 57 truck
3731762 265, 2x4 carbs, 56 Corvette
3737739 283, 57-62, Corvette, FI
3737775 283, 327, 62-67
3740997 283, 57
3743056 283, 58
3743096 327, 62-67 GMC truck
3747363 283, 57-61
3747460 283, 327, 59-67
3748720 283, 57-58,
3748770 283, 1x4 , 2x4 carbs, FI Vette, X58, stagger VC bolts
3748772 283, 58-61
3755537 283, 57-62
3755539 283, 58-62, stagger VC bolts
3755549 283, 57-62
3755550 283 Corvette, 59, stagger VC bolts
3755585 327 GMC truck, 62-67
3756519 283, 57-62
3760116 283, 60-64
3767460 283,327,60-64
3767462 327, 62-67, 161/65cc ports
3767465 283, 59-61
3767754 283 Power Pack, 59-61
3767792 283, 60-64
3770126 327, 69
3774682 283, 327, 60-64
3774684 327, Pass, Truck, 62-64
3774692 283, 60-61 Corvette
3774692 283, 58-64 Pass, Power Pack
3782461 327, 64-66 Double humpers or Camel hump 161/62cc port
3782461X 60-63, Larger intake runners, 172/64cc port
3782870 327, 62-37
3789817 327, 62-67
3789935 283, 57-62
3790721 283, 64-67
3792563 327, 65-67
3795896 283 Power Pack,63-65
3795896 327, 250HP Corvette, 62-64, 140/60cc ports
3798996 327, 63-67
3814480 283, 327, 60-67
3814482 327, 350, 62-67, 75cc, Lo compression head
3817680 283, 327, 63-67
3817681 327, 350, 62-67
3817682 283, 61-62
3836839 265, 55
3836842 283,327, 57-67
3837064 265, 283, 56-62
3837065 265 truck, 55-56
3837739 283, 57
3848720 283, 57-58
3849852 283, 57-67
3849935 283, 65-67
3852174 327, 62-64
3854520 283, 327, 62-67, 140/60cc ports
3870064 265, 283, 56-62
3870065 265 Truck, 55-56
3876775 283, 327 210 HP Camaro, acc. bolt holes on one end only
3884520 283, 327, 60cc, some made in canada
3890462 302, 327, 350, camel hump, 161-165cc intake port
3901068 350,285HP Crate motor, 64cc, 72ºintake bolt angle
3911032 307, 327, 68, W/O acces. bolt holes
3912264 283, 58-62
3912265 283, 63-64
3912311 327, 67
3912313 327, 65-67
3917290 307, 327, 67-68, 142/59cc ports
3917291 302, 327, 350, camel hump, 161/65cc ports
3917292 327-350 Corvette, camel hump, 68
3917293 307, 327, 75cc, 144/58cc ports
3927185 307, 327, 69cc, 69-70
3927186 302-350, camel hump, 63cc chambers, 161/65cc ports
3927187 350, camel hump, 64cc, 69-70
3927188 307, 74cc
3928455 302, 327, 68
3928494 327, 350, 68
3928495 327, 68
3931633 307, 68-72
3931635 250, 68-76
3931637 327, 68-69
3931638 327 truck, 68
3932441 350, 76cc, 161-165cc intake port
3932441X 350, 80cc, 1.94-1.5 valves, 161/65cc port
3932441X 400, 80cc, 1.94-1.6 valves, 161/65cc intake port
3932454 307, 69
3946812 350, 69
3946813 350, 69-70, 138/72cc ports
3747041 302, 350, 64cc
3951598 400, 70, 76cc
3964286 350
3970126 327, 350, 67-70
3973414 350, 70, LT1, 64cc, camel hump
3973487 350, 71-76,
3973487 350, LT1, 75cc, 161-165cc intake port
3973487X 350, 75cc, larger intake port
3973493 400, 71, 76cc
3986316 350 Corvette, 71, 76cc
3986336X 350, 76cc
3986388 307, 350, 68-76
3986339 307, 350, 71, 75cc
3986339X 307, 350, 75cc
3991492 350 LT1, 70, 64cc, straight plug, camel hump
3991492 Over counter, strt or angle plug, 64cc, 157/62cc ports
3998916 350 LT1, 76cc, screw in studs, big valves?
3998920 350, 72-73
3998991 307, 350, 75cc, 72-73, 73 had hard seats
3998993 307, 350, 76cc, 72-73, 15-164/64cc ports, 73 had hard seats
3998993 350 Crate motor, current, Hecho En Mexico, 159/64cc ports
3998997 350, 400, 76cc, 72-73, hard seats in 73
3998997 305, 350, 161-165cc intake port, hard seats
4079261 350, 75.
10033867 Pontiac Alm. Race head, angle plug, 62cc, 196cc intake port, 23º, 2.10-1.625 valve
10045434 Pontiac Alm. Race head, angle plug, 55cc, raised runner, 15º roll over
10051101 Bowtie, Alm, angle plug, 55cc, raised runner, 196cc intake port
10088113 350, 88-up, Corvette, Alm., angle plug, 58cc, .100 raised D-port ex. 1.94-1.5 valve, 19 lbs.
10106178 350, 90, LT5, ZR1, DOHC, 32 Valve, Pass. Side
10106179 350, 90, LT5, ZR1, DOHC, 32 Valve, Driver Side
10110810 350 Gen.I, 93-up
10128374 350 GenII, LT1, 53cc, angle plug, Corvette, Alm., reverse flow cooling, 168-175 cc intake port
10134352 Bowtie, Lo port, alm. 18º, angle plug, 45cc, 223cc intake port
10134363 Bowtie, Hi port, alm, 18º, angle plug, 45cc, 210cc intake port
10134363 Bowtie, Hi port, alm., 18º, angle plug, 60cc, 215cc intake port,
10134363 Bowtie, Hi port, alm., 18º, angle plug, 50cc, 250cc intake port, CNC machined, 2.15-1.625 valves
10134363 Bowtie, Hi port, alm., 18º, angle plug, 65cc, 250cc intake port, CNC machined, 2.15-1.625 valves
10134363 Bowtie, Hi port, alm., 15º, angle plug, 36cc, 223cc intake port
10174389 350, LT5, ZRI, DOHC, 32 Valve, 91-95, Driver side
10174390 350, LT5, ZRI, DOHC, 32 Valve, 91-95, Pass. side
10185040 Symmetrical port, splayed valve, alm, 45cc, 263cc intake port, 1st design
10185040 Symmetrical port, splayed valve, alm, 45cc, 263cc intake port, 2nd. design
10205245 350, Gen.II, LT1, alm., 93, reverse flow cooling, 168-175 intake ports
10207643 350, Gen II, LT1, alm., 94-96, reverse flow cooling
10225121 350, LT1, ZR1, DOHC, 32 Valve, driver side, 94-95
10225122 350, LT1, ZR1, DOHC, 32 Valve, pass. side, 94-95
10239902 350, 96-up, GenII, LT4, alm., reverse flow cooling
10239906 350, Vortec 5700, L-31, 64cc heart shape chmber, 1.94-1.5, 170cc intake port
14010201 305, 84
14011034 Bowtie, Phase 2, iron, angle plug, 64cc, 2.02-1.6, 184cc .080 taller intake port
14011039 350 HP Replacement Alm.
14011049 Bowtie, Phase 6, alm., angle plug, 55cc, 2.02-1.6 or 2.1-1.65, 180cc intake port
14011083 350-300HP, Crate Motor, 64cc, 90º manifold bolt, hard seats
14011083 350, 87-up, 64cc, center bolt VC, 72º manifold bolt
14014415 267, 305, 80-85
14014416 305 HO, 80-85, 58cc, 1.84-1.5, 165/59cc ports, 7 bolt ex.
14022601 267, 305 HO, 80-85, 58cc, 1.84-1.5, 7 bolt ex.
14022801 305, 80-85
14071114 350, 80-85
14079261 350, 86
14096217 350 285HP, Crate motor, 1.94-1.5, 72º intake bolts, 64cc, center bolt VC
14101081 305, 87-88 Camaro, center bolt VC
14101083 350 285HP, or 300HP, Crate Motor, 1.94-1.5, 72º intake bolts
14101128 350, Corvette, 86-87, alm., angle plug, 58cc
14102187 305HO, 87-91, 1.85-1.5, 58cc, 7 bolt ex.
14102191 305, 350, 87 up center bolt VC
14102193 305, 350, 87-up, 7 bolt ex.
24502559 Bowtie, SB2, alm., mirror port,
33417369 350, Gen.I, Crate motor, Hecho En Mexico, 7 bolt ex, 76cc, 1.94-1.5, flange VC holes, heavy castings

World Products Cast Iron Heads ( by part numbers )
4351 67cc, 162cc intake port
4350 76cc, 162cc intake port
4205 58cc, 162cc intake port, 305 torquer
4256 67cc, 172cc intake port, torquer
4257 76cc, 172cc intake port, torquer

Trick Flow Twisted Wedge Alm ( by part number )
31400001 64cc, 2.02-1.6, screw in studs, guide plates,185cc intake ports, candid valve angles
31400002 same 01, except with 72º intake bolts for 87-up
31400003 same 01, except with center valve cover bolt, 86- up
31400005 same 01, except 1.440 valve springs
31400006 same 01, except, with 72º intake bolts, old style valve covers

Edelbrock Alm. Heads
6061 Performer RPM Bare head, angle plug, 70cc
6063 Performer RPM Bare head, straight plugs, 70cc
6071 Performer RPM Same as 6061 exc. complete
6073 Performer RPM 70cc, 170cc intake port, straight plug, complete
6075 Performer 65-up, 70cc, 2.02-1.6, screw in studs, guide plates, heat riser
6085 Performer 87-93, center bolt valve cover, 60cc
6087 Performer 87, center bolt valve cover, 60cc, 165cc intake port
7700 Vr. Jr. Race Heads, Bare, 71cc, 212-267cc port, CNC Machined, 2.08-1.6,
7720 Same as 7700 exc complete

Big Blocks

058 241/86 cc port
063 256/114 cc port
083 243/110cc port
215 256/114cc port
241 252/116cc port
280 256/114cc port
290 256/114cc port
290 262/115cc port small plug head
291 327/120cc port
340 320/120cc port
820 255/114cc port
840 326/120cc port
842 318/112cc port
990 323/127cc port

330864 396-454 70-81 Oval Port
330865 366-427 70-76 Truck HD Oval Port
336781 454 73-85 Oval Port
343771 366-454 68-85 Truck HD
343772 366-454 76-84 Truck HD Oval Port
346236 454 75-76 Oval Port
353049 400-402 70-76 Oval Port
473328 366 68-85 Truck HD Oval Port
3732791 348 58
3758379 348 59-61
3759256 348 58
3767738 348 59-61
3781147 348 60-61 Hi Perf
3795586 409 61 360HP
3814690 409 62-64 Hi Perf
3819333 348-409 62-65 Truck
3830817 409 63-65 340 HP
3837731 409 63 RPO Z11
3852583 409 65 400 HP
3856206 396 65 Oval Port
3856208 396 65 Corvette 425 HP Sq. Port
3856213 366 66-82 Oval Port
3856260 396 68
3872702 396-427 66 Oval Port
3873858 396, 427 66 Sq. Port
3876875 427 77-85 Truck Oval Port
3904390 396-427 67 Oval Port
3904391 396-427 67 Sq. Port
3904392 427 67 Sq. Port Alm L-88 & L-89
3904393 366 66-68 Truck Oval Port
3909802 396-427 67 Oval Port
3917215 396-427 68 Oval Port
3917219 366-427 68-85 Truck HD Oval Port
3919840 396-427 67-69 Sq. Port
3919842 396-427 68-69 L-88 & L-89 Alm
3931063 396-427 68-72 Oval Port
3933148 366-427 68-84
3933149 427 68-76 Truck
3946074 454 69-71 Alm. L-88, ZL-1, LS-6
3964290 400-454 70 Oval Port
3964291 402-454 70 Sq. Port L-78, LS-6
3965198 396 68-69 Oval Port
3975950 366-427 68-70 Truck Oval Port
3986133 366-427 68-85 Truck Oval Port
3986136 366-427 68-84 Truck Oval Port
3993820 400-454 71-72 Oval Port
3994026 454 71 LS-6 Sq. port
3999241 402-454 72 Oval Port
6272292 402-454 70-75 Oval Port
14092359 427 86-88 Truck Oval Port
14092360 454 85-88 Truck Oval Port

Chevrolet

Chevrolet Big Block Cylinder Head Casting Numbers

RECTANGULAR PORT - Valve size 2.19 intake, 1.88 exhaust
Casting Years CID Chamber CC HP/RPO/Comments
3856208 1965 396 Closed 109cc 375hp/425hp z-16 chevelle
3873858 1966-67 396/427 Closed 109cc 375 L-78
3904391 1967 396/427 Closed 107cc L-71/L-72, 1.72
3904392 1967 427 Closed 106.8 430, 435 L-88/L-89, 1.72 ex
3919840 1967-69 396/427 Closed 107 375 L-78 425, 435 L-71/L-72, 425 COPO
3919842 1968-69 396/427 Closed 106.8 375 L-89 430, 435 L-88/L-89, 1.84 ex
3946074 1969-71 396/402/427/454 Open 118cc 375 L-89 430 L-88/ZL-1 425, 465 LS-6/LS-7
3964291 1969-70 396/402/427/ Closed 109cc 396/402/427/454 large or small spark plug
3964292 1970 454 Closed 109cc 450 LS-6,
3994025 1971 454 Open 118cc 425 LS-6,
3994026 1971 454 Open 118cc LS6
6258723 1971 454 Open . .
6272990 1970 454 Open 118cc service replacement mkIV
10045427 400/454/455 . . Pontiac/chevy aluminium small port /race
10051128 1990-94 454 Semi Open 72cc IP 400cc, bowtie, sym port
12363401 1996-up . Open 118cc bowtie aluminium mkIV gen.V gen.VI
12562934 2000-up 502 Open . gen.VI 502 marine
14011077 1989-94 454 Open 118cc IP 295cc, replacement, C port
14044861 1989-94 454 Open 115 425, 105.0cc, IP 380cc, bowtie, W port
14096188 1970-71 454 Open 118cc service replacement ls-6 markIV
14097088 1991-up 454/502 Open 118 .
24502585 1997 . . . olds/chevy aluminium

OVAL PORT - Valve size 2.06 intake, 1.72 exhaust
Casting Years CID Chamber CC HP/RPO/Comments
330864 1970-81 366/427/454 Open . .
330865 1970-84 366/427/454 Open . .
330866 1968-78 366/427 Open . .
330867 1968-73 427t Open . .
336765 1973-84 427/454 Open . .
336768 1973-76 427t Open . .
336781 1973-85 454 Open 113cc .
343771 1968-85 366/427/454 Open . .
343772 1976-84 366/427/454 Open . .
343783 1975-78 454 Open . car & truck
346236 1975-87 454 Open 113cc .
346238 1975-87 454 Open 113cc .
352625 1970-76 454 Open . truck
353049 1970-73 402/454 Open 113cc .
366725 1974-78 427 . . .
473328 1968-85 366 Open . .
3856206 1965-66 396 Closed 97.2cc 325
3856213 1966-70 366 Closed . truck
3856260 1968 396 Closed . truck
3872702 1966 396/427 Closed . 325, 360 L-34/L-35 390, L-36 98.4cc
3876875 1966-70 427 Closed . truck
3904390 1966-67 396/427 Closed . 325, 350 L-34/L-35 390, 400, L-36/L-68 98.4cc
3904393 1966-68 366 Closed . truck
3908952 1967 427 Open . truck marine
3909802 1966-67 396/427 Closed 109cc L-34/L-35 L-36/L-68
3917215 1967-69 396/427 Closed 109 325, 350 335, 385, 390, 400 L-34/L-35
3917219 1966-70 366/427 Closed . truck
3931063 1969-70 396/427 Closed 109cc 325, 350 335, 385, 390, 400L-34/L-35
3933148 1969 366/396 Open 122cc 2V/427 265 car & truck
3933149 1969-70 427 Open 122cc truck
3935401 1968-76 427 Open . .
3964280 1966-70 427/454 Closed . 335, 385, 390, 400 LS-5
3964290 1969-70 396/402/427/454 Closed 109cc 325, 330, 350 400 ls-5
3965198 1969 396 . . truck
3975950 1968-70 366/427 Closed . truck
3986133 1970-85 366/427 Closed . truck
3986135 1969-73 366/427 Open . .
3986136 1970-84 366/427 Closed . truck
3993820 1971 402/454 Open 113cc 300, 330 LS-3 365 LS-5
3999241 1972 402/454 Open 113cc 240, 300, 330 LS-3 365 LS-5
6272292 1971 402/454 Open . 240, LS-3 270, LS-5
10052902 427 Open . MKIV
10101136 1991-94 454 Open . truck
10114140 1991-up 366/427 Closed . gen.V
10114156 1991-up 454 Open 118cc gen.V
10121033 1978-88 454 Open . truck
10141279 1996-up . Open 100cc Vortec7400
10487052 1977-90 366 Open . .
12352783 1979-93 454 Open . truck
12363391 1996-up . Open 110cc aluminium MKIV gen.V gen.VI
12558162 2001-up 496 Closed . VII Voretc 8100 truck
12560241 1998 -up . Closed 100cc Voortec 7400
14025175 1983-93 454 Open . truck
14081044 1986-90 454 Open . truck
14081045 1978-87 454 Open . .
14081052 1985-87 366/427/454 Open . truck Marked HIPERF
14092359 1986-89 427 Open . truck
14092360 1985-89 454 Open . truck
14101398 1986-90 454 Open . truck