Go buy SC motor w/ M90. Port heads/intake. Buy aftermarket ported blower. Run a wicked aftermarket cam. Bigger better IC. LT headers O/R X pipe. Build up the 5 speed. get a fox 8.8 swap your axles on for disk brakes. Run some sweet gears in that rear. Upgrade your fuel pump and injectors. Cut a hole and custom fab a tube from your side scoops to your rear brakes to help in cooling them.
Get coilovers, Fat rear sway bar. Look into other set ups like pan hard, tq arm, watts, and stuff like that. Definately control arms though. rear tower support bar in the trunk. Kenny Brown has an even bigger Full Length Subframe kit you'll want. And get a nice roll cage. Now start dropping wieght. rear seat delete and other light weight items. No passenger seat, light racing driver seat w/ 5 point harness. Get some sweet as wheels/tires. AND GTF down the track !
ohhh and
Fill the trunk w/ about 4 nitrous bottles, connect them all. Run a push button nitrous set up and some damn good bottle heaters. External fuel tank/pump set up for the nitrous fuel, and run it w/ 116 octane.
Really want to get down to it ? Buy a forged rotating set up and have a crazy strong motor. Bump up the blower PSI and run a little bigger nitrous jets. 400-500hp/tq, sick sounding six, drifting mofo, w/ a blower screaming !