I have converted 4 wheel drum brakes on a '68 Ranchero to front wheel power disk. Everything is new, Master Cyl, Distribution Valve, Calipers, Rotors, Hoses both front and single rear to axle, used a Rebuilt Original '69 Power Booster and a Rebuilt/New Master Cyl. Everything has been installed. The brakes have been bleed multiple times with a power bleeder. I do not have any brake pedal, unless the power bleeder is hooked up to the system. I pre-bleed the master cyl. before installation. I have plugged the master cyl. ports, tested the pedal and the pedal is firm. Hooked it back up, no brakes. I have removed the calipers and turned them so the bleed ports were straight up and bleed them again, no brakes. The rear brakes have been adjusted using a brake shoe caliper, no extra play. The master cyl. is for disk brakes with the rear brake port on the front of the unit pointing down and the front brake line pointing to the left side at the top of the shock tower. The calipers are single piston type. There are no brake line leaks. Any ideas as to why there are still no brakes? 1.) Still air in the lines? 2.) Bad master cyl., even though pedal is hard when the ports are plugged? 3.) Wrong master cyl. for the the calipers? Not enough volume in '69 Master Cyl. for Single Cyl. calipers?