The '95 should be a Series II... so there should be some available parts/mods atleast lol.
180 degree thermostat, gutting the airbox, and basic tune-up procedures are what you're gonna want to start with though.
After the basics are taken care of, you can start getting to things like the exhaust, like a hi-flow cat or a performance crossflow muffler. You won't see a big difference by doing this, but it does help the air flow better out of the car. And it'll sound sweet...
These will all help set the stage for mods where you have to start digging into the internals.