Power/Manual Brakes?

The thing is, it is the diameter of the bore in the MC that determines the pedal effort -- a larger bore makes a stiffer pedal with shorter stroke, a smaller bore makes for less effort but a longer stroke. The weird thing is, on A-bodies, Mopar supplied a smaller bore MC with power brakes (15/16), and a bigger bore MC (1-1/16, IIRC) with manual brakes -- the opposite of what you might think would be logical. So the factory manual disk brakes require pretty hefty pedal effort, but the feel is great. If you just remove the vacuum unit from the power brake MC, it works fine, and is still less pedal effort than the factory manual setup -- many people recommend this MC for that reason.