[427sharpe]

I presume you are running discs @ all 4 corners?? If your lines run that far above the master, you have to make SURE that all the air is out! Air will gravitate to the highest point in the system and stay there. Are you 100% SURE that ALL the air is out of the system? If you are, the lack of residual pressure valves could very well be causing your weak pedal. Modern calipers have a square cut retaining seal that acts as a nominal retractor to pull the caliper piston back from the rotor. If there is no resistance, it may be drawing them back too far. A quick check: raise one end of the car just enough to get the wheel off, and then lower the car to its approximate ride height. If you can get to the brake pad, see if it 'wiggles' freely. If it does, ck again after one pump of the pedal..is it tighter? If so, you need a residual pressure valve to keep them from retracting so far. If you are using Tilton masters, they offer a variety of residual valves to help you tune the brakes. You want just enough pressure to keep the pad in LIGHT contact with the rotor, but NO DRAGGING. I think I ended up with 1.5 psi valves in my car, and my pedal woes went away.