wally409
Well Known Member
I have an opportunity to buy a 70 GMC half ton for $300. The guy's had it sitting in his yard for 3 years and wants it gone. I've done some research on the engine and it has the 3970010 block in it. From my understanding, that's the one with the high nickle content. Mortec identifies it as one of three possibilities: 69 Z-28 (4-bolt main) , 1968, 327 (trucks and industrial 2-bolt) or 1969 - 1980 350 with 2 or 4 bolt mains. I checked the heads and they don't seem to match the block for the year it was cast. The head numbers are the same with two possibilities.
3795896: identified as either 63-65 283 (60 cc chamber) or; 62-64 327 (60 cc chamber).
That doesn't jive with the year of the block. The other interesting thing is that there is no ID on the front pad of the block. The only thing I can come up with that it's a replacement block or that its' been decked. The engine appears to be quite original - when I took off one of the valve covers, the gasket came apart - brittle and dried out.
It has ram-horn style exhaust manifolds, Q-jet and cast 4-bbl manifold and is a 4-speed truck.
Has anyone come across this combination? Any thoughts? Thanks - I appreciate it. Wally
3795896: identified as either 63-65 283 (60 cc chamber) or; 62-64 327 (60 cc chamber).
That doesn't jive with the year of the block. The other interesting thing is that there is no ID on the front pad of the block. The only thing I can come up with that it's a replacement block or that its' been decked. The engine appears to be quite original - when I took off one of the valve covers, the gasket came apart - brittle and dried out.
It has ram-horn style exhaust manifolds, Q-jet and cast 4-bbl manifold and is a 4-speed truck.
Has anyone come across this combination? Any thoughts? Thanks - I appreciate it. Wally
