No pedal after bleeding brakes

:( I have a 72 dart with factory disc, 4 piston calipers. I swapped that setup with a 73 dart. I bought a new 73 master cylinder and calipers to start fresh. The only thing from the orignal setup is the brake booster and proportion valve. I have went through a lot of brake fluid and still have no pedal. Do I have to install a 73 proportion valve?