Quick run down. 70 b body 4 wheel power drums. All new brake pads, wheel cylinders, and hardware. I had Ramman rebuild the booster and master cylinder. When driving the car it stops fine. (once in a while it hits harder on the brakes then you think it should with the given pedal pressure) But the main problem is after applying the brakes (say at a stop sign) When you let off it can take 3 seconds or longer for the pedal to come all the way back up and release the brakes fully. You can put your foot on the back side of the pedal and pull up. And it releases as soon as you do that. It stays down about 1 to 2 inches of pedal travel. Master cylinder sticking? Booster fubar? Thanks in advance.