Clint do you remember a 70-? duster about the same color as ur car, that used to win quite a bit at Tulsa? had a 499 inch big block that they had to back the big dominator off, to keep the bottom end together. it went mid 9`s backed off, was close to being a clone of you car, maybe a little more race orientated. I would personally build a big small block if I were doing it over, just because mine is so crowded it`s harder to work on.