More questions:
I am still not happy with the brakes. They function, but the pedal is hard and the brakes really start working about 3/4 of the way through the pedal. I think the rear brakes are taking too much of the load. The front doesn't seem to dive at all when braking hard, and the rear brakes get very hot fast. I am taking the steps others have done and before I purchase a F-150 master cylinder, I bought a proportioning valve. I wanted to mount it at the rear, where the hard line goes to the soft line to the pumpkin. It would be out of the way and easy to get to for adjustment. And, I would only have to add a small piece of hard line to get it installed without messing with the factory lines. Cheap, quick install.
Ok, finally, the question: Does it matter where in the rear brake line the proportioning valve it mounted? I know most people seem to mount them near the master cylinder, but there is already a bunch of stuff there taking up all the space. Opinions??