WMF

Can anyone tell me what kind of heads these are.

Chris Sunkin

Older GM rectangular port heads. Get a casting number off of it and that'll narrow it down.

330864.....68-84...oval...OPEN...396, 402, 366T,
427T, 454 Truck
330865.....68-84...oval...OPEN...396, 402, 366T,
427T, 454 Truck
330866.....68-78...oval...OPEN...366T, 427T
330867.....68-73...oval...OPEN...427T
336765.....68-78...oval...OPEN...427T
336768.....73-76...oval...OPEN...427T
336781.....73-85...oval...OPEN...454, 118cc chamber, 256/114cc ports
343771.....68-86...oval...OPEN...366T, 427T, 454
343772.....68-86...oval...OPEN...366T, 427T, 454
343783.....70-76...oval...OPEN...454 Truck
346236.....75-87...oval...OPEN...454, 120cc chamber, 225/116cc ports
352625.....70-76...oval...OPEN...454 Truck
353049.....73-84...oval...OPEN...454, 122cc chamber, 255/119cc ports
366765.....74-78...oval...OPEN...427T
473328.....68-69...oval...OPEN...366T
3856206....65-66...oval..CLOSED..396, 97cc chamber
3856208....65......rect..CLOSED..396/425hp, 109cc chamber
396/375hp "Z-16" Chevelle
3856213....66-82...oval..CLOSED..366T, 427T
3856260....68......oval..CLOSED..396 Truck
3872702....65-66...oval..CLOSED..396, 427, 98cc chamber
3873858....65-67...rect..CLOSED..396, 427, 109cc chamber
3876875....77-85...oval...OPEN...427T
3904390....67......oval..CLOSED..396, 427, 98cc chamber
3904391....67......rect..CLOSED..396, 427, 107cc chamber
3904392....67......rect..CLOSED..427, Aluminum, L88, L89, 107cc chamber
3904393....68-76...oval...OPEN...366T
3908952....67......oval...OPEN...427, "M.Truck", Marine
3909802....67......oval..CLOSED..396, 427, 101cc chamber
3917215....67-68...oval..CLOSED..396, 427, 101cc chamber
3917219....68-85...oval...OPEN...366T, 427T
3919840....67-69...rect..CLOSED..396, 427, 107cc chamber
3919842....68-69...rect..CLOSED..396, 427, Aluminum L88, L89, 107cc chamber
3931063....68-69...oval..CLOSED..396, 402, 427, 101cc chamber
3933148....69-84...oval...OPEN...'69 396/265hp, 366T, 427T, 112cc chamber
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
'71 454 LS6, "round exhaust port"
3964290....69-70...oval..CLOSED..396, 402, 427, 454, 101cc chamber
Large or small hex spark
plugs used
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
3986133....68-85...oval...OPEN...366T, 427T, 454 Truck
3986135....69-73...oval...OPEN...366T, 427T
3986136....68-84...oval...OPEN...366T, 427T, 454 Truck
3993820....71......oval...OPEN...402, 113cc chamber, 255/114 ports
3993820....71-84...oval...OPEN...454 Passenger and Trucks, 113cc chamber, 255/114 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 MKIV crate engines, 118cc chamber
10045427...........rect..........Pontiac/Chevy Aluminum, 91cc chamber
Large Port, race
10049875...........rect..........Pontiac/Chevy Aluminum
Small port, race
10051128...........rect..........Bowtie, Aluminum 72cc chambers
Symmetrical ports
10051129...........rect..........Bowtie, Aluminum "raw"
casting, Symmetrical ports
10052902...........oval...OPEN...MkIV, 427T
10101140...91-up...oval..CLOSED..Gen.V 366T, 427T
10114156...91-up...oval...OPEN...Gen.V & VI 454, 118cc chamber
10141279...96-up...oval..CLOSED.."Vortec 7400", 100cc chambers
10487052...77-90...oval...OPEN...366T
12363391...96-up...oval...OPEN...Bowtie, Aluminum, Signature
Series, fits MKIV, Gen.V, Gen.VI, 110cc chamber
12363401...96-up...rect...OPEN...Bowtie, Aluminum, Signature
Series, fits MKIV, Gen.V, Gen.VI, 118cc chamber
12558162...01-up...oval..CLOSED..Gen.VII,"Vortec 8100", 8.1L, 496, truck
12560241...98-up...oval..CLOSED.."Vortec 7400", 100cc chambers
12562932...91-95...oval...OPEN...Gen.V, truck crate motor, 118cc chambers
12562933...91-95...oval...OPEN...Gen.V, 118cc chambers
12562934...00-up...rect...OPEN...Gen.VI 502 Marine
14011077...69-up...rect...OPEN...Aluminum, fits MKIV, "C-port"
118cc chamber, also sold as a "solid" head
14044861...84-96...rect..........Bowtie, Aluminum, MkIV,
"raised runners", 1st design, 105cc chamber
14044861...96-up...rect..........Bowtie, Aluminum, Signature
Series, fits MKIV, Gen.V, Gen.VI
"raised runners", 2nd design, 115cc chamber
14044861...84-96...rect..........Bowtie, Aluminum, MkIV
"raw" casting of "861" MKIV
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 later Mark IV LS-6, LS-7 and 454 HO crate motors, 116cc chamber
14097088...91-up...rect...OPEN...Gen.V 454/502 HO, 118cc chamber
24502585...97......rect..........Olds/Chevy, DRCE 2,
Pro Stock aluminum, for blocks w/4.900" bore spacing
25534404...04......rect..........Olds/Chevy, DRCE 3, Pro Stock, aluminum, for blocks with 4.900" bore spacing

1CE

Nice job Chris ! A.B. that engine been/go under ?

Andy

Looks like Davy Jones worked on it last.

WMF

Hey Chris where is the casting #'S

WMF

Yes the motors on my Apache look Bad, I am trying to figure out what I have, the owner never told me if they were 454, or 502's, or what work was done to them!!, I think I am going to replace them because or thier condition, but just wanted some info.

Chris Sunkin

It varies. It'll be the only 7-digit number- they're just like the other charachters you can see- raised parts of the casting. Pull the rockers and take pics of all the lettering and we can tell.

open87

iTrader: (2)

geez chris , how about numbers for a pontiac

Chris Sunkin

PM me an e-mail address and I can send it to you in an Excel file, if you'd like


Pontiac
Year CID Advertised HP Head casting # Valve Sizes
intake/exhaust Approx CC or static CR

1959 389 215-345 hp 531395 1.88/1.60 69
1960 389 215-345 hp 536109 1.88/1.60 69
389SD 348-363 hp 535461 1.92/1.60 69
1961 389 all 538177 1.88/1.60 69
421 all 538177 1.88/1.60 69
389SD 368/373 hp 540306 1.92/1.66 68
421SD 368/373 hp 540306 1.92/1.66 68
1962 389 all 538177 1.88/1.60 69
421 all 538177 1.88/1.60 69
389SD 385/405 hp 540306/544127 1.92/1.66;2.02/1.76 68
421SD 385/405 hp 540306/544127 1.92/1.66;2.02/1.76 68
1963 326 250 hP 543797 1.88/1.60 8.6 cr
326 260/280 hp 548232 1.88/1.60 10.25 cr
389 215/230/235 hp 543796 1.88/1.60 8.6 cr
389 267/283/303/313 hp 543797 1.88/1.60 10.25 cr
421 320 hp 543797 1.88/1.60 10.75 cr
421 353/370 hp 9770716 1.92/1.66 72
421SD 390/405/410 hp 544127/9771980 2.02/1.76 64
1964 326 250 hp 9773345 (845) 1.88/1.60 8.6 cr
326 280 hp 9773395 1.88/1.60 10.0 cr
389 215/230/235 hp 5437796 1.88/1.60 8.6 cr
389 267/283/303/306 hp 9773345/(845) 1.92/1.66 10.5 cr
421 320 hp 9773345/(834) 1.92/1.66 10.75 cr
389 325/330/348 hp 9770716 1.92/1.66 72
421 350/370 hp 9770716 1.96/1.66 68
1965 326 250 hp 62 1.88/1.60 8.6 cr
326 285 hp 22 1.88/1.60 10.5 cr.
389 256 hp 75 1.88/1.60 8.6 cr
389 290/325/333 hp 76 1.92/1.66 10.5 cr.
389 335/338/360 hp 77 1.92/1.66 10.5 cr
421 338 hp 76 1.92/1.66 10.75 cr.
421 356/376 hp 77 1.92/1.66 10.75 cr
1966 326 250 hp 094 1.88/1.60 8.6 cr
326 285 hp 095 1.88/1.60 10.5 cr
389 256 hp 091 1.92/1.66 8.6 cr
389 290/325/333 hp 092 1.92/1.66 10.5 cr
389 335/360 hp 093 1.92/1.66 10.5 cr 68cc
421 338/350 hp 092 1.92/1.66 10.75 cr 70 cc
421 356/376 hp 093 1.92/1.66 10.75 cr 68 cc
1967 326 250 HP 140 1.92/1.64 9.2 cr
326 285 HP 141 1.92/1.64 10.5 cr
400 255/260/265 HP 142 1.92/1.64 8.6 cr
400 290 HP 143/061 1.92/1.64 10.5 cr.
400 325/333 HP Big Car 143/061 (closed chamber) 1.92/1.64 10.5 cr
400 350 HP (GP) 670/9787671/187 2.11/1.77 72 cc
400 325/335/360 HP 670 (closed chamber) 2.11/1.77 72 cc
400 325/360 HP RA 670/97 (closed chamber) 2.11/1.77 72 cc
428 360/376HP 670/9787671 (closed) 2.11/1.77 72 cc
1968 350 265 HP 17 1.96/1.66 8.6 cr
350 320 HP 18 1.96/1.66 10.5 cr
400 265 HP 14 1.96/1.66 8.6 cr
400 290/340 HP Big Car 15/215 1.96/1.66 10.5 cr
400 350 HP (GP) 16/ 216/ 62 2.11/1.77 72-75 ccs
400 330 HP (FB) 16/ 216/ 62 2.11/1.77 72-75 ccs
400 335/350/360 HP 16/ 62 2.11/1.77 72-75 ccs
400 335/360 HP RA I 31/ (37) 2.11/1.77 72 cc
400 340 (FB) /366 (GTO) R/96/ A (RA II) (rd port) 2.11/1.77 72 cc
428 375 HP 16/ 216 2.11/1.77 72 cc
428 390 HP 16/ 216 2.11/1.77 72 cc
1969 350 265 HP 47 1.96/1.66 8.6 cr
350 325 HP 48 2.11/1.77 10.5 cr.
400 265 HP 45 1.96/1.66 8.6 cr
400 290 HP 46 1.96/1.66 10 cr
400 340 HP (GP) 16/ 62 2.11/1.77 72 cc
400 330,335,350/ 366 HP 16/ 62/ 48 (MT) 2.11/1.77 72cc
400 345(FB) /370 (GTO) 722 (RA-IV) 2.11/1.77 71 cc
428 360 HP 16 (small-valve ) 46 1.96/1.66 10 cr
428 370 HP (GP) 62 2.11/1.77 72 cc
428 390 HP 16/ 62 2.11/1.77 72 cc
400 375 HP(RA-V) 44 Tunnel Port 2.11/1.77 67 cc
303 RA=V Tunnel Port 546184 2.11/1.77 56 cc
1970 350 255 HP 11 1.96/1.66 8.8 cr
400 265 HP 11 1.96/1.66 8.6 cr
400 290 HP 16 (small valve) 1.96/1.66 10 cr
400 330 HP Big Car 16 1.96/1.66 10 cr
400 330 HP 12 (MT) 2.11/1.77 72 cc
400 330 HP 13 (AT) 2.11/1.77 72 cc
400 345 HP(FB/RAIII) 12 2.11/1.77 72 cc
400 350 HP (GP) 13 2.11/1.77 72 cc
400 350 HP (GTO) 12 (MT) 2.11/1.77 72 cc
400 350 HP (GTO) 13 (AT) 2.11/1.77 72 cc
400 366 HP (GTO) 12 (RA III) 2.11/1.77 72 cc
400 370 HP (RA IV) 614 (Round Ports) 2.11/1.77 71 cc
455 360 HP Big Car 15 1.96/1.66 87 cc
455 360/370 HP (GTO/GP) 64 2.11/1.77 87 cc
1971 350 250 net HP 94 1.96/1.66 96 cc
400 265 net HP 99 1.96/1.66 98 cc
400 300 net HP 96 2.11/1.77 96 cc
455 280 net HP 98 1.96/1.66 114 cc
455 325 net HP 66 2.11/1.77 114 cc
455 335 net HP (455HO) 197(191) (Round Ports) 2.11/1.77 111 cc
1972 350 175 net HP 7H1 1.96/1.66 7.6 cr
400 200 net HP 7J2 1.96/1.77 8.4 cr
400 250 net HP 7K3 2.11/1.77 96 cc
455 200 net HP 7L4 2.11/1.77 114 cc
455 250 net HP 7M4 2.11/1.77 114 cc
455 250 net HP 7M5 2.11/1.77 114 cc
455 300 net HP(455HO) 7F6 (Round Ports) 2.11/1.77 111 cc
1973 350 150/175 net HP 46/4C 1.96/1.66 96 cc
400 170/185 net HP 46/4C 1.96/1.66 98 cc
400 200 net HP 4x/4C 2.11/1.66 98 cc
400 230 net HP (AT) 4X-7H screw-in studs likely 2.11/1.66 98 cc
455 215/250 net HP 4X-1H screw-in studs likely 2.11/1.66 114 cc
455 290 net HP (455SD) 16 (Round Ports) 2.11/1.77 111 cc
1974 350 155/170 net HP 46/4C 1.96/1.66 7.6 cr
350 200 net HP (GTO) 46 (screw-in studs) 1.96/1.66 7.6 cr
400 175/190 net HP 46/4C 1.96/1.66 8.1 cr
400 200 net HP 4X-4H/4C 1.96/1.66 99 cc
400 225 net HP (AT) 4X screw-in studs likely 2.11/1.66 98 cc
400 225 net HP (AT) 4C 2.11/1.66 98 cc
400 225 net HP (MT) 4X-3H screw-in studs 2.11/1.66 98 cc
455 215/250 het hp 4X-1H screw-in studs likely 2.11/1.66 114 cc
455 215/250 net hp 4C 2.11/1.66 114 cc
455 290 net HP (455SD) 16 (Round Ports) 2.11/1.77 111 cc
1975 350 ALL 5c/ 6X 2.11/1.66 7.6 cr
400 ALL 5c/ 6X 2.11/1.66 7.6 cr
455 AIR 6S 2.11/1.66 7.6 cr
350 HO non-air 6H 2.11/1.66 7.6 cr
1976 350 ALL 6X-4/ 6S 2.11/1.66 7.6 cr
400 ALL 6X-8/ 6S 2.11/1.66 7.6 cr
455 AIR 6S 2.11/1.66 7.6 cr
455 HO non-air 6H 2.11/1.66 7.6 cr
1977 301 ALL 01 1.72/1.50 8.2 cr
350 ALL 6X-4/ 6S 2.11/1.66 7.6 cr
400 180 hp 6X-8 2.11/1.66 7.6 cr
400 200 hp 6X-4 2.11/1.66 8.0 cr
1978 301 ALL 01/02 1.72/1.50 8.2 cr
350 ALL 6X-4/ 6S 2.11/1.66 7.6 cr
400 180 hp 6X-8 2.11/1.66 7.6 cr
400 220 hp 6X-4 2.11/1.66 8.1 cr
1979 301 ALL 01 1.72/1.50 8. 2 cr
400 220 hp (MT only) 6X-4 2.11/1.66 8.1 cr

Pismo10

Wow! Fantastic info.