Already have - full bolt ons
Future - New performance clutch and flywheel next month and enjoy it. Then a custom tune at some point, probably a local dyno tuner or learn myself on a QH.
More Future - Most likely sell it in 2 or 3 years and buy a Coyote or a Terminator. I'd spend just as much money building a motor/power adder/fuel system for this car as I would just buying something that will hold its value and already be at the 400whp mark with little/no work.
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.