455 engine block numbers
#1
455 engine block numbers
Hello All. Looking for a little help deciphering the numbers on an engine block. 396021F near the front, 279 by the distributor and 68 F3 near the flywheel. Thanks for your help.
#2
396021 F is the generic 455 casting number. 3 279 is the casting date. The "F" number on the back is a casting mold reference (contrary to urban myth, it does NOT indicate anything about nickel content). The VIN derivative stamp will tell you the exact model year of the block. Bottom line is that this is a perfectly fine 455 core.
#5
#9
im no expert but ill give it a shot
30m155994
3=Olds
0=1970
M=Lansing plant
155994=the last 6 digits of the vehicle VIN number.
I think those last digits can be associated w a b or c bodies but i dont know the sequencing
30m155994
3=Olds
0=1970
M=Lansing plant
155994=the last 6 digits of the vehicle VIN number.
I think those last digits can be associated w a b or c bodies but i dont know the sequencing
#10
how was the casting date by the distributor hole used/decoded?
was there a block casting foundry at the Lansing plant?
3/27/9 (Thursday March 27, 1969) ??
279th day of year? 279th day of '68 (Saturday October 5, 1968) ??? or 279th day of '69 (Monday October 6, 1969) ????
30M155994's body should've been built 10B (October - second week) 1969
Toronado used a different assigned VIN sequence number (0M600001~0M626000), but all others used the same range (0M100001~0M416000) at Lansing for 1970
was there a block casting foundry at the Lansing plant?
3/27/9 (Thursday March 27, 1969) ??
279th day of year? 279th day of '68 (Saturday October 5, 1968) ??? or 279th day of '69 (Monday October 6, 1969) ????
30M155994's body should've been built 10B (October - second week) 1969
Toronado used a different assigned VIN sequence number (0M600001~0M626000), but all others used the same range (0M100001~0M416000) at Lansing for 1970
#12
The VIN derivative shows that this block came from an A-body, not a full size. In the 1970 model year, the Lansing plant divided the VIN sequence numbers among the car lines. 100001-400000 were assigned to A-body cars, 400001-700000 to B/C-body cars, and 700001-up to Toros. The 155994 sequence number shows this block is from a Lansing-built A-body. That could have been a 442, a Vista, or a Supreme SX.
#14
The VIN derivative shows that this block came from an A-body, not a full size. In the 1970 model year, the Lansing plant divided the VIN sequence numbers among the car lines. 100001-400000 were assigned to A-body cars, 400001-700000 to B/C-body cars, and 700001-up to Toros. The 155994 sequence number shows this block is from a Lansing-built A-body. That could have been a 442, a Vista, or a Supreme SX.
here's October '69 from a Lansing VIN list I started putting together last week
Last edited by hurst68olds; September 1st, 2017 at 10:19 AM.
#20
#22
#25
I’m looking at a 64 442 which is advertised as having a 455/365hp. The vin derivative number is 33x110443. If I have done my homework I believe this is a 1973 block from the KC plant? I’m trying to verify that this block is actually a 455. What other casting numbers should I be looking for?
#26
I’m looking at a 64 442 which is advertised as having a 455/365hp. The vin derivative number is 33x110443. If I have done my homework I believe this is a 1973 block from the KC plant? I’m trying to verify that this block is actually a 455. What other casting numbers should I be looking for?
The heads are identified by a letter near the number 1 or 8 spark plug and by a casting number over the center two exhaust ports. A 1973 motor from Fairfax would have come with J heads. None of this indicates a "365 HP" motor.
#27
Joe, thanks for quick and helpful info. I’m trying to also get some documentation on what they did to the engine to make the claimed 365hp. I believe the max stock hp was 250? Waiting to hear back on if heads are stock to block or aftermarket? Anything I should be concerned about with the “J” heads?
#28
sage:
Joe, thanks for quick and helpful info. I’m trying to also get some documentation on what they did to the engine to make the claimed 365hp. I believe the max stock hp was 250? Waiting to hear back on if heads are stock to block or aftermarket? Anything I should be concerned about with the “J” heads?
If you see "J" heads on the engine and its a '73 455, you can be assured they transplanted it and its a low performance engine from a "B" body (big car). The burden of proof is on the seller. Good luck.
......Just my two cents worth.
I'll post a couple ID charts for you to save on your computer. Print them out, study them and take them with you.
#30
Yet Another Block Identification
Trying to identify this block's stamping.
According to OLDsterRalph's chart it's a second run 455.
According to the VIN stamp it's a 1973 block built in Arlington TX. My question is what is the first 3 for? According to the parts book it's supposed to be a letter for the usage code:
According to OLDsterRalph's chart it's a second run 455.
According to the VIN stamp it's a 1973 block built in Arlington TX. My question is what is the first 3 for? According to the parts book it's supposed to be a letter for the usage code:
#31
3 = Oldsmobile Division
3 = 1973 model year
R = Arlington, TX assembly plant
126836 = sequence number from the VIN of the car it was installed in
Keep in mind that the VIN derivative is comprised of nine of the thirteen characters in the car's VIN
3 = 1973 model year
R = Arlington, TX assembly plant
126836 = sequence number from the VIN of the car it was installed in
Keep in mind that the VIN derivative is comprised of nine of the thirteen characters in the car's VIN
#32
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