I have a problem with brakes locking up after engine warms,if I crack a line open at the master it will relieve some pressure so i can roll again, but afew miles down the road it happens again. My setup is a relatively new one Master cylinder,prop valve,etc bought from ChevyDuty, on '79 nova front clip, and rearend same doner, front disk and rear drums, '52 1/2 ton, '61 235 intake is where the booster gets it vacuum. Ive looked at many posts but havent found much to address hard pedal problems, could someone please help or steer me the right direction. Oh, and sorry for the long "first" post, but if anyone knows the answer its a "Bolter"! LoL Thanks Rob
