Reply to "USING MUSTANG ROTORS"

Larry, to answer some questions, using slightly smaller rotors in the back will not be a problem, except for the maintenence issue of the outer edge of the rotor grinding a notch in the edge of rear brake pads. This is especially true if you're still using the toy-sized stock rear brake calipers because pad area is very small.
For those with too-wide Mustang rotors, why not cut down the pad thicknesss? Sure, the pads will wear out faster but you've saved so much over aftermarket Pantera rotors, you should still be financially ahead after a few years. The rotors could be cut down in width, too.
Stock '71-74 Pantera front rotors were about 1/4" smaller than the rears. Don't have the exact diameters available- something like 285mm and 297mm as a guess.
Finally, in mounting bone-stock Mustang rotors in the rear: was this done to the outside of the axle flange? If so, that pushes the wheel outboard by the thickness of the rotor's flange, and there are aftermarket wheel combinations that will then have fender clearance issues.
All rotor-swappers: keep in mind that a ventillated 0.81" or 0.94" thick rotor, on either end, will lighten your Pantera's unsprung weight, and will stabilize at maybe-150F degree lower temperatures, in street and light competition. Brake fade may be eliminated under these conditions. But for long, hard open-track events or possibly ORRs, rotors less than 1" wide WILL warp. Gr-4, GT-5 & -5-S cars used 1.25" thick vented rotors that're heavier than the stock 0.82"-thick solid rotors on '71-74 Panteras. Thermal mass is more important in competition than ultralight-weight rotors.