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Old 12-18-2012, 03:04 PM
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Originally Posted by cobalt327 View Post
M = Mexican casting. I see nothing for "9VP" or "VP". Could be a crate engine or a light truck engine. Truck suffix codes aren't that well represented in most data bases.

The block casting number would be a better indicator. The suffix you have is often seen on the c/n 10066036 block- which is a 1-piece rear main seal block w/o the casting bosses for a factory roller cam and lifters. Whether or not this relates to your engine remains to be seen.

To tell if it's a roller engine, you might be able to see down past the p-rod into the lifter valley if you have good lighting. If you see the roller cam spider, that tells you. Or you can remove a push rod to see if it's a roller or not. Flat tappet p-rod will be about 7.8", the roller engine uses a 7.2" p-rod.

Good luck.
Thats it! near the transmission, at back of the block. is that number-10066036,and not sure, but I thought the original owner said it was a 4 bolt main truck block? does that make sense? Can we tell what year?
Thanks again.
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