I used a-body spindles from the early 70s; the 10" rotors (including bearings & seals), calipers w/ pads, 15/16th master cylinder for disc/drums all from early 70s b-bodies . Biggest expense was getting custom hoses from Dr. Diff; very nice units, worth the price. Cost me about $200-250. Did this conversion about 12 years ago. Works nice; parts are easy to buy for maintenance. For me, this is as close as I'll get to factory style disc brakes for a '67 GTX.