The back of the block will have a series of letters and numbers cast into it. That is what determines the date.
1969
1996
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 #
a 350 or 327 that is the question. A 350 or a 327
i called the Chevy dealership and they told me the year
1969 to 1979 I've seen those blocks up to the mid-80's.
Look again, could it be 3970010? If so it came out of a 1969-79 car, truck or Vette
That engine could be anywhere from a 1969 to 1972 350. Some of them were 4-bolt mains and some were just a 2-bolt main engine.
The casting number 3970010 identifies the engine as a 350 cubic inch small-block Chevrolet engine produced between 1969 and 1979. The suffix code V01I7TDD indicates that the engine was built in the Tonawanda, New York plant, on January 7, 1970. Therefore, this engine is most likely a 1970 model year engine.
That should be a 4 bolt main 350
Yes, a 350 engine with casting number 3970010 typically features a one-piece rear main seal. This casting number corresponds to a later model small-block Chevy engine produced from 1986 to 1995, during which time the transition to a one-piece rear main seal design was implemented. If you're working on this engine, you can expect it to have the one-piece seal configuration.
you need the date code on the side of the block it will be a series of numbers and letters first its the month, then day, then year