What mod should i do next I want 3.73 gears i also want a crane cams HI-6 Fireball ignition and also want to go with headers eventually one day include nitrous. Which one of these will be the biggest bang for the buck excluding nitrous

 

the headers will give you the most power about 25 to 35 depending on either long tubes or shorties. the coil wont give more the one or two hp. and gears dont give power but are much more fun and will improve track times. i'd say get the headers then gears.

 

Go with gears and Headers....