What Master Cylinder? and more

use a M/C with a 15/16" bore size from a 73-74 a body(i.e. bendix #11571) this will tame pedal effort about 20%. the pushrod from any 63-76 a body manual brake car, regardless of disc or drum, is the same length. keep the existing distribution block and just plumb in the adjustable prop valve between the dist block and the rear brakes.