Numbers on the motor of trucks and other vehicles are identification numbers for the engine block casting. These numbers identify the batch of production the engine block comes from and can be used in recalls.
chevy 350
From the research I have done that block goes into 1968 - 1971 and possibly through 1975
what does the casting number GM 3892657 say about this engine block
It's a 95-00 350.
There are numbers on the block where the transmission connects to the motor right on the top write down the numbers and cross check them on the web there are a lot of sites where you cad run motor numbers and get the exact date of birth engine displacement compression ratio piston size and everything you want to know about that engine.
Compare vin. numbers between engine block and tag in window and or door jam. If numbers are the same, then the motor is original.
on the right side of the block where the head meets the block in the front is a small flat shelf and have numbers stamped there and a salvage yard could help you out with numbers
look at the serial numbers on the side of the block and get a decoding book.
3970010 is a 327 in the years from 1967-1969 and 350 from 1976-1979
a block is not a kind of motor, is is a piece of a motor. it is the part that the piston moves up and down in.
Find a book on casting numbers for chevys it will give you the year of the block the heads & the manifolds.