Nah a 75/78mm TB is standard for the upgrade.
I'll go with 230rwhp or so. Nothing you can do to the PI engine except for exhaust is really going to add anything power wise. At least not anything meaningful or worth $hundreds.
Much better off putting all that bling money into suspension and wheels and tires than cai/tb/pullies etc...
2000 Mustang GT Steeda build #48. Bolt ons, suspension, Novi 2000.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.