I bought a new Bendix booster, M/C and proportioning valve from Dr. Diff. Finally got to test drive today. Wow- I actually have working brakes.
When I removed the old proportioning valve and compared it to the new one the passages in the new one were twice the size. After installing everything and turning on the vacuum pump and pressing the brake- no more groan from the booster. Went for a 20 mile test drive and then checked the temps on all the brakes with my infrared temp gun. all the brakes were cool, nothing hanging up or dragging.

Thanks to all for the advice/input.