I recently purchased a rough (no dash, bad body) '86 IROC-Z28 with a swapped out "327" with all of the goodies. I plan on swapping the engine into my '88 v6 t-5.

I say "327" because that is what I was told it was. I tried to check the casting # and engine Id but the id on my block is not on any sites that I can find.

The engine casting number is 3970010 (which i have read can be either a 302, 327, or 350).

The engine id numbers on the front of the block are V726TDT and C8U225919.

Will someone help me out or give me a link that actually has my id suffix listed?

Any information will ne appreciated.

 

Anyone? Anyone?

 

The 2nd number is from the VIN of the vehicle it came from.

The first number: http://www.nastyz28.com/chevy-engine-code-stampings.php
"V" = Flint engine plant. "726" = July 26th. "TDT" = 1980 California light duty truck 350 - you know, the 155 HP wonder.

You've been lied to, but how surprised are you at that? In this case, I'd say it's a lie in the right direction.

Of course, that's just the block. It could have a large-journal 3.25" stroke crank in it, in which case it is now a 327.

More important is what heads are on it. Pull a valve cover and get the head casting #'s.