73-76 sliding calipers not sliding?

Thanks. I definitely can't move them by hand. The calipers moved freely until i tightened the retainer bolts. I suspect that the force of the piston when the brakes are applied will move the caliper on the "ways". I was concerned with how the caliper would move back after the brakes are released so the pads don't drag. Sounds like the pads self adjust by wearing slightly against the rotor.