Will be cheaper to sell your car and buy a GT. Not making that up. Its not as simple as just dropping in the 4.6L and hooking a few things up. You'll basically need an entire donor car for wiring, ECU/cluster, suspension, rear, trans, brakes etc... If you want to do it right anyway.
So sell your car and buy a nice cheap 96-98 V8 and PI swap it.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.