what does the casting number GM 3892657 say about this engine block
What Chevy engine block has the castin I mean casting number 397004
3963512 is not a part number. That is the block casting number for Big-Block 427 or 454 engines
350 cu/in block used in GM Goodwrench Crate Motor. Made in Mexico.
Sometimes the website linked below can be helpful.
Find the casting number on them... type "GM (insert casting number)" into a search engine and you should find what you're looking for.
1966 or 1968 327.
350
That block was used from 69-80 to build 302's, 327's and 350's.
Engine.gm.473483#
It's a 4" bore block. Has been used for 302, 327, and 350 engines.
Check out this site, http://www.nastyz28.com/sbchevy/sblock.php