ID '60-'62 POwer Brake Booster Adapter Bracket With A Clutch

[60ShortStepGMC]

Originally Posted by 60ShortStepGMC

Many places say no proportioning valve required for drum/drum applications, but one would be required because of the new dual diaphragm master cylinder, correct?

To answer my own question: No, a proportioning valve is not required for a drum/drum application with dual diaphlegm master cylinder. This thread helped clue me in:
http://67-72chevytrucks.com/vboard/s...=332148&page=4