injectors wont be needed unless you are pumping out 250+ hp.
headers will be a waste of money unless you have opened up the heads/lower intake
throttle body is the biggest bang for the buck
a cone filter (KKM) will defniatly help the sound
a bigger MAF may help, but probably wont be much of a noticeable gain
You best bet is to get the 410 comp cam ($250 from summitracing) with some Deltacam rocker arms ($200
www.deltacam.com) and some 5.525" pushrods from deltacams or smithbros
The cam, plus the throtte body, will probably get you in the 175 horsepower range
port your lower intake, you might be in the 180 hp range
port your heads and add in a good set of headers (BBK, BORLA, JBA) you will be in the 190hp range
Up your compression to 10:1 using SOHC pistons with the 91-94 heads; or you can use 95-98 style heads with your 91-94 pistons, and you will find yourself around 200-210 hp
use the 422 cam, and those numbers will look like 210-220. Although, that will require dual valve springs
Add in a nitrous kit, and plan on 300hp
