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, 72║intake 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, 23║, 2.10-1.625 valve
10045434    Pontiac Alm. Race head, angle plug, 55cc, raised runner, 15║ 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. 18║, angle plug, 45cc, 223cc intake port
10134363    Bowtie, Hi port, alm,  18║, angle plug, 45cc, 210cc intake port
10134363    Bowtie, Hi port, alm., 18║, angle plug, 60cc, 215cc intake port,
10134363    Bowtie, Hi port, alm., 18║, angle plug, 50cc, 250cc intake port, CNC machined, 2.15-1.625 valves
10134363    Bowtie, Hi port, alm., 18║, angle plug, 65cc, 250cc intake port, CNC machined, 2.15-1.625 valves
10134363    Bowtie, Hi port, alm., 15║, 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,  90║ manifold bolt, hard seats
14011083    350, 87-up, 64cc,  center bolt VC, 72║ 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, 72║ 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,  72║ 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 72║ 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 72║ 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