It's a 4" bore block. Has been used for 302, 327, and 350 engines.
1977
Gm 3970010 the model?
3970010 can be a 350 two or four bolt block.
That should be a 4 bolt main 350
it is a 1969-1979 motor it was used in cars, trucks, and vettes
No. That number was used for 302's, 327's, and 350's. (4" bore)
casting number 3970010 is a 350 block from 1969 - 1979 but in 1969 302 and 327 have the same casting # and im not to sure about the other #
350 and 327 [1966 - 1980]
The back of the block will have a series of letters and numbers cast into it. That is what determines the date.
Numbers on the motor of trucks and other vehicles are identification numbers for the engine block casting. These numbers identify the batch of production the engine block comes from and can be used in recalls.
1969
1996