GMC Troubleshooting Questions? Ask a Mechanic for Answers
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There should be a casting number on the top back of the engine where the trans bolts up.
BTW way what do you want for it?
Tip the motor over. It is on the top by where the trans bolts up
The casting number needed for identification is on top
I am attaching a link to Big Block numbers. Maybe this will help
OK. How about 2 or 3 digit codes
My suspicion is that it is out of a 454SS truck sold in the 90's. I cannot locate the engine codes from the newer tonnawanda engines.
Do you have any other parts?
I will opt out and see if someone has more information. PM me when you find out what you have as I may be interested and I will watch ebay for it.
Hi, if that has a one piece rear main seal it is a block from a Chevy Performance 454 HO crate engine or short block. Here is a spec sheet on it as it came from the factory.