Ranchero71

I put 72 Mustang disc brakes on my 71 Ranchero without a power booster. It now takes both feet to stop. I am sure I need to change the proportioning valve. Has anyone already done this? What did you replace it with?

CatSkinner

In a braking system, the master cylinder, calipers, and proportioning valve are all engineered to work with each other. If you only took the disc brakes (calipers and rotors), you probably have a set of calipers looking for the higher pressure of the booster.Before going nut trying to balance it out, I'd look to try to finish recreating what was in the mustang.

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Prius repellant, just add gas.