Finally had time to mess around with Rita's brakes again. I bypassed the willwood adjustable proportioning valve to the back brakes and they work perfect. Just sitting there applying the brakes you can hear stuff crunching in the back when you push on the pedal hard, and on the gravel road they almost lock up before the fronts but not quite. I think we're going to call it a win, I don't know why they work perfect without a proportioning valve but I'm fine with it.