I found new block numbers on my 350
the block number i already found was
3970010
i also found
5 M19
D A N
1
does this tell other information?
thanks

 

The 010 at the end of your block number lets you know it was a high nickel content block. Supposedly they're stronger then other blocks because the nickel makes the iron harder.

They were made between [I think] '70-'80 and came in 2-bolt and 4-bolt mains. You have to pull the pan to check.

You'll need someone else to figure out all the date code info for you though.