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Old 02-04-2007, 10:42 AM
relyks82 relyks82 is offline
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numbers on a 305 engine

hey i bought a 56 chevy from this older woman and she said the motor was a 305 but she wasnt sure and I was trying to figure out what year motor if it is a 305 and what kind of transmission-if anybody could help me that would be great..the numbers on the engine are 14101074, firing order 18436572..the numbers on the trans are 10c14487..thanks
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Old 02-04-2007, 12:45 PM
m1k3sthemannn m1k3sthemannn is offline
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Look for the code on the passenger side, just forward of the head, where it meets the block. Looking down on the engine it is stamped into the block, along with a partial VIN. Should be 3 letters.

Comparing that number on google, looks like it is a 305, but might be an "HO" engine. Oh yay, a High Output 305. But at least with the 3 letter code you may know exactly what it is. (HP, application, year)
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Old 02-04-2007, 02:08 PM
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thanks,i'm going to look at it right now
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Old 02-04-2007, 02:12 PM
relyks82 relyks82 is offline
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i just checked,the number is either 638 or G38..i couldnt tell if it was a 6 or a G..
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Old 02-04-2007, 10:21 PM
Gearhead52 Gearhead52 is offline
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You're missing some numbers here......

The numbers on the pass front side of the engine are specific to application on anything after 1972 I think, or at least around that year. You need a GM code book to decipher them. Prior to then you could get the info from any repair manual. The only number I see close to the number you gave from the block is 1410147 which is an 85 and up 305.

If it's a 305 then you should see a casting number next to the block casting of 5.0. This should confirm that it's a 305.

You might want to check the block casting number again, which is on the rear of the block between the rear of the head deck and transmission flange on the rear of the engine.

Mortec.com has many of the casting numbers you'll find.
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Old 02-04-2007, 10:33 PM
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Quote:
Originally Posted by relyks82
i just checked,the number is either 638 or G38..i couldnt tell if it was a 6 or a G..

638 was a 350 made between 86-89 for c10 chevy pickups and g20 vans. Also in 91-92 camaro had 638 on the block. I believe they are all 2-bolt mains but I could be wrong on that. Try and see if there is another casting number on the block. What you might have here is a 350 block with 305 heads. 305 would have 627 stamped on the side.
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Last edited by justen; 02-04-2007 at 10:47 PM.
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Old 02-04-2007, 10:47 PM
relyks82 relyks82 is offline
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i'll be sure to check all of this tomorrow but gearhead i'm almost positive there are no other numbers by the 5.0 stamp..but i will check in the morning..
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Old 02-04-2007, 11:29 PM
danny danny is offline
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the number is on the driver's side behind the head in front of the bell housing, you will be able to see it looking straight down unless there is a lot of debris covering it. you will want to clean this area as well as you can because the number is there.
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Old 02-05-2007, 12:13 AM
m1k3sthemannn m1k3sthemannn is offline
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These are the types of codes you look for on the passenger side front of the engine: suffix codes

Beware, if the block has been decked (rebuilt and they shave off a bit of metal off that surface) or it was a crate engine, the stampings will not be there.

I see no listing of a G38 or 638, it should be a 3 *letter* code. If it's dirty, wipe the area well.
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Old 02-05-2007, 03:48 AM
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This might be able to help you out, just click on Engine and Transmission Identification.

Because we know they didn't make a 305 in 56.

Good luck!
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Last edited by Daniel Wood; 02-05-2007 at 03:57 AM.
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Old 02-05-2007, 09:03 AM
relyks82 relyks82 is offline
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hey guys i checked and the numbers were 14093627 and i used daniels link to find out that this is a 305 1988-94 model..thanks for all of your help, now i have to get rid of it..
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Old 02-05-2007, 09:44 AM
danny danny is offline
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why do you have to get rid of it?
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Old 02-05-2007, 09:50 AM
relyks82 relyks82 is offline
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this guy i know was rebuilding me a 350 and i was trying to sell this 305 to pay for some of it..but when i thought that this 305 may have been a 350 i was going to keep it for another project..but i'm just going to get rid of it, do you guys have any sites for transmission numbers? i dont know what kind of trans this is either..the numbers i got from it are 10c14487
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Old 02-06-2007, 11:20 AM
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how many bolts are on the transmission oil pan? I believe the numbers you have is a pre-69 transmission.
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Old 02-07-2007, 12:58 AM
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This site has the pan pattern.
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