alrighty i know this has been covered a million times, but Just got to bleeding the brakes after the disc swap. The pedal almost hits the floor. I bleed the system long and good (even when you pump it fast it doesn't get higher). I'm using discs and rear drums of a 73 grande. the prop valve was from the same car. the M/c is from the 74 maverick W/o power assist... there appears to be no leaks, and the car stops well, at least in my driveway but the only thing i can think of is that the M/c has too small a bore... any clues??