Engine decodes
Thread Starter
Instructor
Joined: Mar 2008
Posts: 221
Likes: 0
From: Farifax Station VA
Engine decodes
About 10 months ago I logged onto the forum and asked how to decode my engine as it was not the original. But I never could get a definitive answer...Now I have some numbers off the heads, I though maybe this might help.
Block #: 3970010
Drivers Head: 3999699
Pass HEad: 3886388
I am really just interested in if I have a 327 or 350.
Block #: 3970010
Drivers Head: 3999699
Pass HEad: 3886388
I am really just interested in if I have a 327 or 350.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Were there any other markings or date codes on the heads? Neither of those casting numbers are listed on Mortec and that's usually a pretty good site for finding this information out.
Did you have the code from the front pad on the block?
Did you have the code from the front pad on the block?
Drifting
Joined: Oct 2008
Posts: 1,369
Likes: 12
From: wichita kansas
you have a 350 cu in block (original configuration anyway, could have been bored or stroked by now)
we could tell more if you could get the numbers from the front pad. (just below the head on the right front of the engine) next to where the water pump bolts on. rick
we could tell more if you could get the numbers from the front pad. (just below the head on the right front of the engine) next to where the water pump bolts on. rick
Thread Starter
Instructor
Joined: Mar 2008
Posts: 221
Likes: 0
From: Farifax Station VA
OK..I just checked near the water pump and found that someone at one point had chipped the paint off and exposed this number:
V0710OMA18D4241 _ _ there maybe two more numbers on the end, but I can't read them.
V0710OMA18D4241 _ _ there maybe two more numbers on the end, but I can't read them.
Last edited by TyCor; Nov 15, 2008 at 07:29 PM. Reason: spell
Thread Starter
Instructor
Joined: Mar 2008
Posts: 221
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From: Farifax Station VA
Anyone shed some light on these engine codes? I was told when I bought the car that it had a 327. and the guy selling it had a '68 vert also in his garage. He got both cars as payment for some type of service his company did for a customer. He was not into vettes, and just wanted to get the cash out of them.
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
The block casting number could be either a 327 or 350.
No listing for the head castings. Is there a 2 or 3 letter engine code on the block data stamp pad?
http://www.mortec.com/castnum.htm
No listing for the head castings. Is there a 2 or 3 letter engine code on the block data stamp pad?
http://www.mortec.com/castnum.htm
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
As others have said it could be a 327 or a 350. The V0710OMA will narrow it down further.
V is for Flint Michigan ***'y plant. 0710 is the date of assembly. July 10.
The next three letters will determine what engine type it is. Are you sure it's OMA? Maybe CMA?
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Le Mans Master
Joined: Mar 2004
Posts: 7,493
Likes: 1,502
From: Little Rock AR
Based on the casting number, the only factory build would be a 350.
-Mark.
Race Director
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Thread Starter
Instructor
Joined: Mar 2008
Posts: 221
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From: Farifax Station VA
Mike,
what if those three letters were CMA vs. OMA...what would that mean? The numbers/letters are really faded.
How many numbers whould there be....I'll go try again.
what if those three letters were CMA vs. OMA...what would that mean? The numbers/letters are really faded.
How many numbers whould there be....I'll go try again.
Last edited by TyCor; Nov 16, 2008 at 06:43 PM. Reason: spelling
Le Mans Master
Joined: Mar 2004
Posts: 7,493
Likes: 1,502
From: Little Rock AR
That is probably just a careless assembly of information by the author. You have multiple different SBC block castings being used in 1969 but they were not all being used at the same time.
The 327 engine was discontinued by Chevrolet in February 1969 and replaced by the 307 which uses a different block casting. The ".010" blocks weren't being cast before April 1969 so I don't see where we could get a factory built 327 with that "010" block unless I am missing something.
-Mark.
Race Director
Joined: Jul 2001
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Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Much more likely.
O can frequently look like C and vice versa.
