Master Cylinder selection?

Many here like Dr Diff's 15/16"D bore MC w/ adapter plate ($125). You want the smallest bore you can get, for an easier pedal. Nobody can say if you need a proportioning valve since depends on your exact calipers, pads, and tires. You want the fronts to skid just before the rears. With an adjustable prop valve, you can assure that, and they only cost ~$30.