73 Manual Disc/drum Master cyl no residual valve

..if your rear wheel cylinders are 15/16" a change to 13/16" may work.
a bigger rear tire can help as well.

I actually did that before I swapped to the explorer disc axle but it's no longer drum in the rear.
I was looking into how to "adjust" a factory proportioning valve. I suppose one could play with spring rates in the valve, but having to take it apart and bleed the brakes every time, it's not worth the effort when I can get an adjustable valve for <$50.
I was just hoping for an easy win...no such thing in the mopar world :lol: