Unported head quickness?

I'm running a 416 ci small block, w2 econo heads unported, 9 to 1 comp. ratio, 750 hp carb .550 lift solid cam, four speed, 4:30 gear w/ 27" tall tire, super stock springs, all steel, cars weight is 3560 w/me in it, best time so far 12.2 @ 115 mph.