Everything just swaps over. Direct bolt on. You'll need the axles, calipers, and all the brackerts and anti-moan brackets and brake soft lines. Make sure you use 94-98 axles. The other parts can come from any 94-04 Mustang.
You'll need these in addition to 94-98 axles and the rotors and the soft lines.
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North Cobra does sell brackets that allows you to use stock lenght Ranger axles to retain the stock fox track out back, you'll still need the SN95 calipers and rotors and softlines.
I'm in the same dilemma. I have a SN95 GT rear now and want to run some type of black bullitt wheel. I can't figure out what size though. I was originally going to run 17x9's all around but someone told me 18x10's will fit on the rear. Still trying to do my research before I order.
I have CObra brakes and plan on getting crossdrilled rotors, so i will havesomething pretty to look at inside the wheels. The only reason i do not want to go 18" is tire prices. They suck.