Tuner/ chip for 1993 Mustang cobra X32 computer

I'm trying to something to tweak my car and to be honest I don't know where to begin. I do have a good background in electronics though so I know I can figure it out. I have not found anything that is compatible with the X32 computer in my car however and was wondering if anyone has any ideas where to go. My car is an 87 with basically the engine and electronics out of a 93 Cobra. Aside from the stock stuff its got what I was told was a mild RV cam?, MSD ignition, and all the emission stuff removed. I don't know if the computer itself is tweakable through its unused port or if I would need a plug in module that has been programmed. Any helpful info would be greatly appreciated.