1971 dart. Here is another option I just picked up on another site.
I`ve read an article or two on the idea of using 66 Mustang rotors on A-body Mopars that came with KH 4 piston disc brakes (67-69 for ex.) in order to take advantage of the 4.5" bolt circle they offer. Since both systems were made by Kelsey Hayes it doesn`t sound out of the question. I did some research and found that both share the same inner and outer bearing. The Mustang rotor is almost a 1/4" larger in diameter at 11.29" versus the A-body rotor at 11.09". I bought a pair of these rotors Bendix #141017 and took them to a local machinist. The rotors can be used if the rotor diameter is turned down to 11.09. Two other cuts must be made, the inner bearing race must be removed and the seat has to be cut down .271 deeper to allow the rotor to slide up on the spindle ,the seal cup must be cut to match. Neither the Mustang or Mopar grease seal will fit since the od on the Mopar seal is too small while the Mustang seals id is too large. I`m still searching to find the correct grease seal. I paid my machinist $60.00 for the work (took just a little over an hour for both) and the cost of the rotors was just over a $130.00 for the pair. Now I`ve got the 4.5"bc with 1/2" studs on my existing 68 disc brake spindles by using the Mustang rotors. I hope this will help somebody by providing another alternative for getting the big bolt pattern without having to (go to the 73 and up system and) change out everything.
I have a 72 Duster with the KH SBP and am interested in doing this swap. Anyone in or around the Toronto Canada
The only problem I encountered was with the area between the hub and the rotor. It's "as cast" and really rough in this area and it hit my calipers until I took a grinder to it and smoothed things out, after that all was good.
RAYBESTOS 6004R Disc Brake Rotor and Hub Assembly F $41.85 (2) $83.70
SKF 16743 Grease Seals (Stock) $9.33 (2) $18.66
