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Old 11-20-2006, 10:18 AM
Ed? Ed? is offline
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1970 Chevelle

Hi!

I'm working on a 1970 454 SS. I think it's a clone. I'm trying to determine the details of this BB engine.

Here's the numbers:
Above timing chain cover - T 10271 RR
Block in front of right head - C9F 129188

Can anyone provide some information?

Thanks!

Ed

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Old 11-20-2006, 12:20 PM
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Which of those numbers is on the machined pad in front of the passenger side head?

Look at that number and take the suffix (Last letters) andd look it up here.

http://www.nastyz28.com/chevy-engine-code-stampings.php

I couldn't find anything, unless it is "TRR" which is....

TRR 1973 Truck 454 250hp LS-4 VIN Z, L, 20, 30
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Old 11-20-2006, 12:47 PM
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1970 Chevelle

Poncho62,

Thanks for the reply. I had already checked this site, but couldn't find the codes I have. I have rechecked the numbers twice. The code above the timing cover clearly ends in "RR". And the number on the block (passenger side, front of head) starts with C9F. I can't find an alpa-numeric code like this either.

Thanks again!

Can anyone else provide more information?

Ed
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Old 11-20-2006, 01:17 PM
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I have always used the suffix code for Chevy engines. I have found it the most accurate. There are other casting numbers on the side of the block and at the back above the belhousing. I find them more general however.

It is possible that it was a replacement motor...........thus the strange numbers/letters.

Canadian blocks also sometimes didn't have the suffix code, but I have seen that mostly on small blocks.

Maybe, someone else knows more.
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