'65 dart w 73 & up factory discs,10" rear drums,used a new '79 D100 truck MC that had IIRC with either a 1&1/32" or a 1&1/8" bore.Manual,no power. It's a pretty hard pedal compounded by the fact that I did not use the adapter plate to mount the MC as I just cobbled this together for a daily beater & the pedal is too high but I've gotten used to it(sort of). but if I did ANY spirited driving it would not be safe enough.