what does the casting number GM 3892657 say about this engine block
chevy 350
Casting no on the block & then look it up.
It's a 95-00 350.
check the engine block casting number
350 cu/in block used in GM Goodwrench Crate Motor. Made in Mexico.
Try mortec.com.
that would be the casting number of a Chevy 350
I'm assuming the engine is still in the car. The easiest way is to get the casting code of the block. It is located back by the distributor. There are several online sites that have these casting codes listed and will tell you what size and years the engine is.
I checked here: http://web.archive.org/web/20080516024247/http://www.mortec.com/castnum.htm but your number isn't listed. Perhaps you could recheck the block and compare it to the ones in Mortec.
What Chevy engine block has the castin I mean casting number 397004
It's an engine, not a motor - there is a very significant difference between the two - and that block casting code comes back to a 250 CID General Motors inline six engine (it was used in Chevrolet, Pontiac, Buick, and Oldsmobile applications) manufactured between 1968 and 1984.