Well I just bought a black on black 02 mustang gt. its already has some mods but I am not sure what to do next? It already has 410 gears, dragon upper intake plentem, bbk cold air intake, diablo programer,bassani xpipe, no cats and has o2 simulators, and a flowmaster catback! what should I do next? I dont want to speed alot of money on it because I want to sell it and buy a lightening at the end of the summer.