Casting Number / Engine Size
Thread Starter
2nd Gear
Joined: Mar 2010
Posts: 2
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Casting Number / Engine Size
I recently bought a motor and I was told it was either a 283 or a 327 out of approximately a 1965 Vette. I've researched all the numbers I've found on the motor and all I can tell is that it might be a 327 or a 350 from the late 60's or early 70's. The main things I want to know is what year it is, what vehicle it was originally made for and what size it is (283, 327 or a 350)? ... Mainly the size though. Below I'm listing all of the number and places I've found them and see if anyone can decipher them for me. I wrote down the numbers as closely to what the appeared to be as possible.
I believe these letters/numbers were on the front of the block.
C4F415069
V03061JC
I think these letters/numbers were on the top of the manifold
340234 R
B274
These letters/numbers are on the back of the block
GM21
3970010
These letters/numbers are on the exhaust manifold
GM336710
These letters/numbers are on the block inside of where the bell housing mounts to the block.
010
020
509
H18
PS78
2 7/64
I believe these letters/numbers were on the front of the block.
C4F415069
V03061JC
I think these letters/numbers were on the top of the manifold
340234 R
B274
These letters/numbers are on the back of the block
GM21
3970010
These letters/numbers are on the exhaust manifold
GM336710
These letters/numbers are on the block inside of where the bell housing mounts to the block.
010
020
509
H18
PS78
2 7/64
Burning Brakes
Joined: Jan 2003
Posts: 755
Likes: 32
From: Roswell Georgia
If the Block is Okay, It's a Keeper!
...These letters/numbers are on the back of the block
GM21
3970010
GM21
3970010
...These letters/numbers are on the block inside of where the bell housing mounts to the block.
010
020...
010
020...
Here's site to a site with info on how to locate and read Chevy engine codes that might help. Good luck with your new engine!
Last edited by mr.beachcomber; Mar 13, 2010 at 08:22 PM. Reason: Added my reasoning for thinking that the block was fron 1974
Le Mans Master
Joined: Feb 2001
Posts: 8,017
Likes: 2
From: The problem is all inside your head she said to me.
http://www.nastyz28.com/chevy-engine-code-stampings.php
Look here. about half way down the page they get into the letters I just checked a block I have 3970014 T0501CNJ and the CNJ code was there.
My heads 3947041 High horse heads.... This is for sale as I am building another 350.
Look here. about half way down the page they get into the letters I just checked a block I have 3970014 T0501CNJ and the CNJ code was there.
My heads 3947041 High horse heads.... This is for sale as I am building another 350.
Thread Starter
2nd Gear
Joined: Mar 2010
Posts: 2
Likes: 0
Thanks for the info. I cleaned the engine more today and realized one of my letters were wrong. It was the one from the front of the head. I originally put V03061JC but the correct numbers/letters are: V0306TJC
Burning Brakes
Joined: Jan 2003
Posts: 755
Likes: 32
From: Roswell Georgia
Instructor
Joined: Mar 2010
Posts: 112
Likes: 0
From: Rice Lake Wisconsin
Vin code
The GM code site I use shows this as a 1973 350, 160 base HP,4bbl,conventional cab C20-3500 Chev truck.http://www.nastyz28.com/chevy-engine-code-stampings.php
