[OnMy3rdStang]

Im assuming it is a V-6???? You got a heavy mustang! Theres many things you can do to it.
Theres converting to dual exhaust w/hedder, cold air intake, supercharger, swaping the cam, i think you can stroke it too, throttle body,underdrive pullies, gears, a computer, almost anything that you can do to a v-8 can be done to a v-6. If you do use NOS do the smallest amount you can on a stock engine anything below 100 should be ok but 100 may be pushing it a little. Those are the only things I can think of right now.