Crate Motor ID question

mariobro

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Feb 28, 2013
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72 Corvette
I just purchased a 72 Corvette and it had a crate motor installed at some point. I'm am trying to figure out what this motor is exactly and power ratings. If there is somewhere I can look my self, please let me know.

Here is what I have right now.

Drivers side back of block # 10066086

Passenger Side Front Numbers 1M0521 4VP

Thanks
 

ChevyHiPro

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Oct 7, 2012
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1976 Chevy Cheyenne 1500 P/U
Hello and welcome to the forum!
From the Block Casting Number you have posted, 10066086, I have not been able to find this exact casting number.

I have found the following casting numbers that are very close to the number you posted;
10066036, 350 CID, 2 or 4 Bolt Mains, Target Master/Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico".
No year of manufacture is given for this casting number.
10066038, 350 CID, 1992, 4 bolt mains, Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico".

Possibly, if you clean the casting number area say with some solvent and a wire brush, it maybe that the original reading was not correct.
Often times these cast numbers are easy to mis-read.
My guess is, the engine casting number is 10066036.

From the Engine Assembly Code you posted, 1M0521 4VP; 1= Chevy, M = Mexico, 0521 = May 21 (assembly day), 4 = 1994, VP Engine Suffix Code = 350 CID, 260 HP.

I hope some of this information is helpful.
Don't be a stranger on the forum, stop in from time to time and keep us updated on what your doing with your Corvette build!
 

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