Totally confused.

71 Duster 6 cyl auto. 9" drums on the front. The 8-3/4 is out of another A body, no idea what it came from. I acquired a complete front k member etc with factory front disc brakes from a 69 cuda. i see classic industries has the KH calipers for $135.00 each. not sure where to get rotors or pads from ?