More choices on headers is one, #6 spark plug to the fender well clearance, increased air cleaner to hood clearances is another and less weight on the front tires is another, better oil pan choices and so on
Cudaman, Speaking of HP, how fast have you gone so far?
My quickest run so far at 2860 lbs. was 8.86 at 150.+ MPH in the 1/4 mile, 5.50 at 125. MPH in the 1/8 mile at the same weight in the same car. with a single four barrel using pump E85 How about you
I'm shooting for mid to low 4 in the 1/8 mile at 170+ MPH in my new heads up no prep car, maybe quicker and faster