Originally Posted by Chuck33079

The sweet spot on these cars is higher in the powerband. 4.10 (4.08?) gears will keep you in that part of the powerband more. You'll never really get a dramatic increase in low end torque staying NA. You might gain 10-15 ft-lbs after spending a grip getting there. Just re-gear it and rev the **** out of it.

Edit - Take a look at the Motordyne manifold as well. It'll cost you a few hp on top. but gives a noticeable boost in midrange.