Thanks for the replies thus far guys. Pistons are sitting about .115 in the hole and getting into the whole milling of the block/heads/intake thing is something I'd like to keep at an absolute minimum. A 451 would be sweet but I've done some investigating and my budget just doesn't support it. I've tried to work good headers into the equation too, but TTI's are out of my $$ range and they seem like the only option when it comes to C-body headers. That and I've already got the HP manis' too. No track runs in the near future. Just lookin' for a big car with some street stomp.