If anyone wants to know, I will be doing the following mods in stages to the GTP.
INTENSE Level 1 Package - CAI, 3.4" pulley (modular system), SC belt, plugs (2 colder)
INTENSE 1.9:1 roller rockers
Possibly muffler upgrade
Not planned yet. I'll probably get an IC, and then I'll have to get a new trans from all the power I'll be making. That will cost me, and probably won't be done for a long time. I'm not rich.
Also, next to Stage 1, I will be adding this to improve the look of the car. I think it is quite nice.