I just ordered the "D&D Disc Brake" setup for the 67 econoline.
I also contacted White Post Restorations in Virginia as to what has to be done to the 67 econoline 2 valve master cylinder for the disc brake system to work.
White Post rebuilt my master cylinder.
They said all that's needed is to remove the check valve that will be associated with the front disc brakes.
I was under the assumption that a 2 psi check valve was required for the disc brakes to work.
has anyone done the conversion?