yeah i misread it also . i was talking m/c . but same effect. smaller bore caliper will take less fluid to travel which will effect pedal travel some. if the m/c is in the floor most all of them have piss poor pedal ratio . if it is on the firewall the m/c rod can be dropped 1 inch and it will give more pedal but slightly less power . i have had good luck with s10 booster/master cylinders with standard gm calipers .