Exedy 400 should be great for you. Make sure you get a new flywheel too You're 8 bolt so you can use one of the FRPP ones or save money and get a takeoff Coyote unit. They work just fine, just need 4.6L dowel pins which are $14 and take about 5 minutes with a punch to swap.
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 ****.