I have a 71 c10 (w/air) converted to 4x4 Truck with a 396 th400/205 d60 ft and 14 FF rear (drums). I cut off the rear brake pressure regulating valve from the FF. I later found this valve is $250.00 at the dealer.... I have new 1/2 ton Master Cylinder and new 1/2 ton proportioning valve. The rear brakes lock up VERY easily. Question. Do I REALLY need the rear brake pressure regulating valve? I am sure others are running without it. What did you do to stop the rears from locking up? The only thing I can think of is the 1/2 ton brake MC and prop valve. OR The Dana 60 has the wrong brake lines and banjo fittings? I had these custom made using Teflon braided lines and banjo fittings. I could not find the dana 60 brake banjo/bolts. I am wondering if these tiny holes in the teflon brake lines and banjos are my problem? Anyone have thoughts suggestions? I really want to fix this ASAP. Thinking of going to a brake specialist. Or talking to Dynatrac... and buying there D60 parts. I also bled the brakes three times, and changed the front pads, thinking they are glazed. Roads, where we're going we don't need...roads. - Doc. '73 Blazer, 383 - 3/4 ton, ARB F&R, 35"