FWIW when I upgraded the brakes on my car ( 3-4years ago now ) I wanted to see how they worked before I swapped the prop valve. I never did and they work just as great as my friends Monte who did swap in the disc / disc prop valve.
That is strange cause the disk/drum proportional valve has a 10 lbs residual valve on the drum side to compensate for the springs and the disk set up has a 3 lbs residual. Do your back pads not wear out prematurely?
Seem to be fine. I must have a least 15000 kms on the setup since the swap. No noticeable brake drag, heat or dust.
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