I have the exact car. I bought it back a while ago and have not had the chance to jump into heavy mods...YET! Mostly stock except for MAC underdrives, off-road H pipe with flowmasters, and an a/c eliminator kit. Sounds like you have a pretty good start on yours though. My plans are probably just like any other with these vehicles. Planned mods/bolt-ons include:
B&M Ripper Shifter
3.73 Rear end gears
MSD Ignition
BBK Shorty Headers
Cobra/GT40 upper and lower intake
etc.
etc.
etc. (Few other random ideas)