Brake Pedal Not Returning

Hey everyone.
So I've got a problem that's been stumping me. I've got brand new master cylinder, brake booster, and front calipers on my 1974 Scamp (front disc rear drum). I've gone through and bench bled the master cylinder then installed it and bled all my brakes. But when I got in the pedal feels good but it doesn't return. So I'm trying to figure out what I need to do or what's messed up. Any advice would be greatly appreciated!