GM8970010 was used for many years of the 350. it is the most common number BUT wont give you an exact year. to find out the information you are seeking look at the pad on the passengers side of the block where the head sits on it. there will be a series of numbers and letters there. write those down and do a search on Google or Yahoo for them. you should get all the answers you need.
what year is a 350 block with the stamp GM8970010
1969
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 #
1969
1977
That # was used from 70-76.
Gm 3970010 the model?
That block was used from 1980-1985.
1996
That block was used from 77-79.
Actually that casting number covers the years from 1968 to 1979. 2 and 4 bolt mains. A very generic 350 number
350 hp Chevy engine small block made in Canada!