Just get a S trim, intercool it and have your tuner dial you in to around 400rwhp and go have some fun with it.
Just make sure you have all your "bolt ons" done, the fuel system to support it and the suspension/driveline to support it too. Putting the supercharger on a stock car will get you good dyno numbers but **** 1/4 mile times.
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 ****.