Kelsey-Hayes proportioning valve for A body

I'm trying to make this simple but never is.
just run the 73 and up style from doctor Diff And your disc brake project will be perfect, less complicated, and easier.

pro valve regulates pressure doesn’t care what caliper you use.

I’m doing the same job on my duster right now with Kelsey-Hayes and am confidently replacing my drum brake distribution block with the later style 73 and up proportioning valve..

make sure you have the correct master cylinder. disc/drum