1991 Ford mustang GT highly modified

This is my fully built mustang gt twin turbo .I got the car 6 months ago and have replaced the clutch with mccloud clutch and flywheel capable of 700wh, throw out bearin, pilot bearing, rear main sea, tranny flui, spark plug, rear end fluid and sea, rovos wheels and tire, sbc calipers powered coated rea, new pads front and rear, new rotors front and rear, auto meter, boos, af, coolant temp, fuel press, sway bar end link bushings, much more all these parts are brand new 0 miles on them . Car had fully built moto, custom exhaust 3.5 inch with spin tech mufflers, custom fuel setup and new tan, twin turbo with custom piping for intercooler, built world class trann, built rear end, sub frame connectors, rear suspension, air bags in coil spring, line loc, have receipts with over 25k worth of work . Dont have motor spec, last guy got the car with built motor and he sent it to a custom shop to finish and tune . Car made over 500whp and supposedly had a 679whp pass on the dyno that the clutch couldn't hold . Whole build doesnt have more than 2k miles on it. Please ask questions .