400 big block

There were what was called "cold weather blocks" that had some extra meat, but they are pretty rare. The basic 400 block is much beefier than all the other B & RB blocks so you can build a pretty stout engine out any of them as long as you do the basic checks, sonic & magnaflux ect. I'm currently collecting parts to build a 499" stroker from a '74 block.

Ted