Help Mushy pedal!

Well I know it's not an A but I did a brake job on a '65 Newport for a guy and I can't figure out what I did wrong.

I switched to a dual pot master and used a prop valve from a drum brake dart.

The Newport has all brand new lines and all brand new hardware. Everything is new!

I had some binding issues with the shoes but got it all straightened out so now the only problem is the pedal is mushy. It goes to the floor.

I bench bled the master twice, and then bled the wheel cylinders in order of rr lr rf lf.

I suppose my question is do I have a bad master? The master is a brand new rebestious unit. The pedal doesn't pump up either.


The car is a power brake all drum car.

Any thoughts? I have another master on order but it's gonna be 5 days and I don't want this car in my driveway any longer.