What to do?

Hi hows it going i have an 86 mustang gt conv. with a 91 5.0 h/o motor and 91 trans. i have a few mods nothing to heavy duty. What should i do next besides 3:73s which im having installed next week. I need the most amount of hp with the least amount of cash.

Full exaust including headers, thats probabaly the best bang for the buck after gears...

i believe i have some after market headers they are just old.. i had the cat-back put on last week.