4 wheel disc on 74 Duster - Prop valve?

I run a wilwood adjustable valve plumbed after the stock proportioning valve ( so the warning light still works.

I'm running stock manual disc / drum master cyl with an exploder disc rear end. Took about 30 min to "tune" the rear with the adjustable valve ( and I was taking my time )

You can remove the stock prop valve IF you plumb the front together then run the adjustable valve from the master rear line AND you don't care about the stock warning light.