What disc brakes are these?

Ahh ok, understood. Is it possible to keep these calipers and switch to the 4.5 bolt pattern? Rear is already an 8.75 with the larger bolt pattern and would like to have the front match for getting wheels...
Read the "sticky" at the top of the brake forum page, on how to use machined, Ford Mustang rotors on the Mopars.
Then people report wheel fitment problems, with the center hub register, being to big of a diameter.