Why do you want power brakes? With a disk/drum A-body a 15/16" manual master cylinder is pretty darn awesome. Better pedal feel, better modulation/control, and really the pedal effort isn't that stiff. I switched my Challenger from power to manual after driving the manual set up on my disk/drum Duster. Maybe an aftermarket booster would be a little different, but the stock power brakes are "overboosted" in my opinion, like the stock power steering. Sure it's easy, but there's no feel.
