I don't have an answer per se' but I can tell you what I ended up doing, my 67 was factory drums, I went to SSBC front disc kit that fits the stock spindle and line set, I went with the Booster and MC from Ames and then to get the right proportioning valve that mounts correctly to the factory mount and lines up with the lines I got the Classic Performance proportioning valve that is pretuned for f disc R drums. The only pain to the whole thing besides figuring out what manufacturer had the most correct parts was the line from the PV to the pass side front, it's set up at the factory to be installed before the engine is installed. Not Classic Industries or other names, Classic Performance.