I bought a Wilwood hanging pedal assembly. I now need to buy the master cylinders for the front and rear brakes. The front brakes are disk (GM calipers from Riley Automotive) and operate off of one master cylinder. The rear brakes are Ford 11" drums on a Ford 9" rearend. Does anybody have any experience with choosing a bore size for each of these master cylinders? They seem to start at .75" dia and go up to 1.125" dia. bore. Any suggestions on what size(s) I should purchase?