Gm 3970010 the model?
1977
look on the bellhousing on the driver's side and write the numbers down and look the numbers up. Google 350 Chevy casting numbers online or go to your local library. the year and the casting number will give you all the specs on that engine.
The back of the block will have a series of letters and numbers cast into it. That is what determines the date.
1996 Trucks but not all, look for casting numbers 062 or 960 on the heads
Find a book on casting numbers for chevys it will give you the year of the block the heads & the manifolds.
Under the rocker cover.
chevy 350
A 350 with four bolt main caps is known as the "double-oh ten block." The last four numbers on the casting are 0010.
That should be a 4 bolt main 350
casting numbers are on the back of the block. there are numbers on the pad by the head on passenger side front that will reveal information too
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 #