Aluminum cylinder heads

What stall ?and
what rear gears?
More stall is the fastest way to getting off the line and more gear will have your engine spooling to shift-rpm Quicker. These two together will vastly increase your street performance, more so than engine power.
Heads and cams work more towards the top of the rpm band.
Stall gets you off the line quicker.
Gears and compression work everywhere, but the fastest way to lose power at the bottom is to sacrifice compression, with too big a cam.
On the way to 60MPH, with an automatic, and typical street gears; you will only ever go thru the powerpeak once, and in all likelihood your tires will be spinning. So absolute power means almost nothing. Even with 3.55s you will only hit 60 at about 4300.
Without changing the rear gears, there are only three ways to get to 60 quicker;
A) less tirespin, or
B) more power at 4300, or
C) more average power beginning at Zero mph.
as to A, a traction aide works wonders.
as to B, this usually means a bigger engine
as to C, this immediately points to a higher stall and/or more gear; either in the trans or in the back.