[njsteve]

High and hard, huh? That's a punchline waiting for a joke. But seriously folks, it sounds like the master cylinder may have been rebuilt in drum brake configuration. I believe the four wheel drum cars have a check valve in the outlet port on both front and rear outlets of the master cyl but a front disc car will only have the check valve in the rear brake outlet. That check valve, if it's there, will hold the pressure in a disc brake caliper and wont let it release until the residual pressure bleeds off. If both of your calipers are sticking then it is most likely the master cylinder.