[rbohm]

some pinto/Mll rotors use the same wheel bearings as the 67 mustang, but you have some problems;
1: the wheel bolt patterns are not the same. the 67 uses a 4x4.5 bolt pattern and the pinto uses a 4x4.25 bolt pattern.
2: you have no caliper mount, nor any provision for one. the 67 mustang used the same 4 piston caliper the 65-66 stangs did, and if you used that caliper mount the pads would half off the rotor.
3: you can use pinto/Mll spindles, but the steering geometry would be screwed up as the pinto spindles are a front steer spindle and the 67 is a rear steer spindle.

if you want disc brakes use the 70 up brakes from a granada, torino, monarch, maverick, comet, montego. also grab an 8" rear froma granada or maverick so you can add 5 bolt wheels to the rear as well.