This is in a 1981 Chevrolet C10 pickup. I was told this is a Cadillac engine. Anyone recognize model?

local://upfiles/5091/4F7EC8FCAB724295A211234F42B7E15A.jpg

Another photo

local://upfiles/5091/7F9C2545C86549D8A92BAA592487B4B8.jpg

It looks like my 368 without all the A/C and stuff.

Big block Cadillac for sure, casting and/or stamped numbers/letters will reveal more.

We are fighting a freeze but will get the numbers tomorrow.... anywhere I should be looking to get the numbers/letters?

eight digit of the VIN number It should be a 9, a 6, a 4 or an N. Not likely an N as that was the diesel engine.

So this is the engine vin? Is that stamped on the block?

This site maybe of help with engine ID

http://www.crankshaftcoalition.com/wiki/Cadillac_engine_Knowledge

For Code 6 and 9 engines the identification pad is located at rear of crankcase behind intake manifold. Happy hunting.

So the only numbers I could find are on top of the engine behind the distributer. The numbers are 1609551
Does this help?

When I google 1609551 with Cadillac it looks like others are saying a 425 V8. Sound right to everyone?