71 Dart 410 stroker ..

73smallblock said
I am running no prop valve on my car with no problem, 28x4.5 Hoosiers up front. I have factory disks in front and willwood in the rear. I'm also running a Dr. Diff 15/16 bore master cylinder.
I originally had an adjustable valve to the rear and ended up taking it out because I was just running it wide open.

If you re read what you wrote, you needed the valve in the front.
If you were using the valve wide open, it means you found better braking with it wide open because that is shifting more braking to the rear. If you would have experimented and put the valve in the front, it may stop even better. IMHO.