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 #
The back of the block will have a series of letters and numbers cast into it. That is what determines the date.
350 and 327 [1966 - 1980]
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
The numbers you provided suggest that your Chevrolet 350 engine was manufactured in 1980. The casting number GM 3970010 corresponds to a 350 cubic inch engine produced between 1969 and 1980, with the suffix code V0817TBC indicating that it was assembled in August 1977 at the Van Nuys plant. Therefore, your engine most likely dates back to 1980.