2 barrel camshaft

Long time ago, had a 67 Barracuda slant six, automatic, stock converter, 3.23 gears, small four barrel and 2.25 exhaust. With stock cam, it ran low 18's in the quarter. Milled the head .090 and stuck in a .440 lift Comp Cam, picked up more than a full second in the quarter. Zero to 30 it was not a bit quicker, but from there on up it came alive. Great passing power, and picked up 15-20 mph on top end. So my vote would be to change cams.