kaze_v8

A stall and some nitrous would be the quickest most noticeable improvement

parks450

iTrader: (18)

You have decent factory heads, you could send them to AI and have them do the magic to them, it's around $1000 if I remember correctly. A smaller converter would help slot as well, I thought you had a different converter until I re-read it. Can always do a tbss intake in there as well to benefit your heads better than your factory Intake. That would just about chew up your budget, may be able to add a stall in there once you sell yours for a new one.