just got a 1972 Maverick with the Granada Disc Brake set-up. Went to put on some new disc brake pads. When I puled the front wheel off,I could see what appeard to be half the caliper piston uncovered The caliper is bolted on correctly. I pull it off. The new pads fit just like the old ones.But they still only cover about half the piston. I'm talking about the part were the in broad pads ride against. So with the in broad pads installed there is a littel les than half the piston showing. Is this normal for the Granada?