I have a disk/drum setup at the moment. Running a hydroboost and new master from a 1983 C10 Diesel 6.2. The proportioning valve is from a 2 door Chevy Tahoe. I only need 1 line off the proportioning valve to the front and 1 to the rear. The bigger line on the proportioning valve fits the bigger port on the master, and likewise the smaller line on the proportioning valve fits the smaller port on the master (they are in a different order so I will bend new lines). The question is, which port on the valve goes to the front? If I were smart I would have marked it before pulling it at the junkyard...clearly I am showing my IQ here!
Pictures below.