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.
1966 or 1968 327.
Find the casting number on them... type "GM (insert casting number)" into a search engine and you should find what you're looking for.
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