Ive been checking out some placing online and catalogs of some parts i can get for the stang....i got about 400 dollars to spend, but i cant think of anything to get, well i have things in mind, but im not sure what will be the best....i plan on doing the rear end, but not now, so i was wondering if anyone had suggestions on some parts i can get to get some more ponies out of my ride....all suggestions will be highly appreciated, thanks

....i was thinking of new heads, but im not to sure if that would be good with stock internals...or would it be fine?

 

what do you have done so far?