Slant Six Tuning/Running Issues

Put an earlier carb on it ,basically set it up like a 65 with only a PCV and a carter 1 bbl. See what happens then. I had this same thing with my 76 Aspen 6 cyl.This is how I solved it.Mid 70's slants are really dogged out and prone to this sort of crap when left in stock condition.They did everything they could to make them pass emissions tests and totally screwed them up. This woke my Aspen right up.It was downright dangerous getting on the highway before and now it just gets up and goes