That block was used from 77-79.
350 4 bolt main
1969
1969
That # was used from 70-76.
1996
That block was used from 1980-1985.
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 hp Chevy engine small block made in Canada!
That block was used from 1968 through1985.
This # 1400207 is not listed-- could be 14010207--1980-85--- 350 4 bolt main truck engine
That is the intake manifold casting number from a 1970 350 CI 300 HP engine.
i called the Chevy dealership and they told me the year