[decooney]

+1

If your heads are worked some already and the cam specs are reasonable now, I'd start with port matching, distributor initial-total, A/F ratio carb tune or upgrade next. Should be enough to overpower basic street radial tires. If not, go back and take another look at cam and heads as others have suggested. Otherwise, a good tuner can typically find a little more here and there. Good Luck.