Well, it been a while, and I am working from memory, but, the 010 at the end tells me heavy duty, maybe truck. Most likely 70's, and a 4 bolt main engine. It may even have had a 186, or 041, or, 441, casting cylinder head on it. All 3 are desireable units today.
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 and a 327
i called the Chevy dealership and they told me the year
The back of the block will have a series of letters and numbers cast into it. That is what determines the date.
Chevy block with casting #3970010 is not a 4-bolt main block---1968--327 cid/250hp A body car---1969-79-350 cid/185hp--car , truck , vette.
Couldn't find that number on Mortec, however 3970010 is a 350.
1977
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
A small or big block Chevy have a casting number on the top of the block behind the driver side head. MorTec has Chevy casting numbers listed online.
3970010 can be a 350 two or four bolt block.
Blocks that have more nickel have 010 or 020 under the timing cover, meaning 10% and 20% nickel.
That casting number belongs to a 1971 Impala. It is a 400 small block chevy. These can be pretty good motors.