So I'm about to take a Chevy 327 out of my 58 Apache and put in a 1974 454 Big Block Chevy. I was wondering, does anyone have any prior knowledge or experience putting a big block in one of these older chevys. Our plan at the moment is to move it about an inch forward to clear the firewall possible, and I'm going to buy some fenderwell headers to bypass the steering box clearance issue. Should I look into buying some new motor mounts as well? or would I be able to use the same steel motor mounts attached to the SBC?