I never got around to finding out about this but looking at the picture, the SSBC rotors look like a dual-pattern rotor hat with the studs installed in the corresponding bolt-pattern holes.
The problem with that rotor is if you use a wheel that is hubcentric instead of lugcentric the hub has nothing to ride on if you use the LBP . I guess one could make a ring that you could put on the hub center to fit a hubcentric wheel as long as it is secured well .
Unless it's got the larger hub size , if that's the case you couldn't use the stock 4" BP wheel ???
Doesn't SSBC sell a spindle with their setup ? If so I'm going out on a limb that you could just install the mustang rotor on it without any mods .