Proportioning valve options with disk brake conversion.

Murray said

Factory disc brakes located the proportioning valve midway between front and back. I would think that any distribution block with a "built-in" proportioning valve would work. I would expect some re-bending of the lines would be needed.

Click to expand...

That would be for the earlier Kelsey/Hayes discs. I would assume the OP is using the later single-piston discs on his '75. That prop/distribution combination valve mounts in the same place whether disc or drum, minor tweeks may be needed for the lines, very minor.