Pull your Air Conditioning (10 hp at the crank plus a whole lot of weight reduction (i'll let you guys know exactly how much when i pull it)) FREE
Swap out your power steering rack and pump for a manual rack (tighter steering less weight and another 5-10 hp free'd up at the crank) - FREE-$300
Change your ignition system (if it's the internal coil type) get an msd dist.cap that uses and external coil and get a coil - $50-$100
Do what Viet916 said
especially <a href="http://www.homemadeturbo.com/">HOME MADE TURBO</a>
Nitros is your best bang for the buck but getting it filled constantly makes it hard to afford anything new.