Today I filled the all new brake system with fluid. I Bench bled the master cylinder using the tubes into the reservoir method and stopped once no more bubbles were seen. Bled rear brakes first with a mighty vac and then fronts. Figured out fairly quickly that my pedal rod adjustment was not correct and I had no play without brakes applied and front wheels were hard to spin. I corrected that. So now the problem is lots of pedal travel and a soft pedal. Details Manual brakes. Disc front, drum rear. Rebuilt GM manual disc master. Right stuff combination valve. Adjustable proportioning valve in line to rear brakes. All new components including rubber hoses, brake lines and calipers. Using DOT 3/4 fluid. Suggestions?