I have a '54 Chevy Big Bolt that one rear brake is hanging up, the truck still moves but... I've pulled off the wheels and the dust cover to find some sort of pin holding the drum on, how do you take this off to get to the brakes? Also I've read there are two adjustment bolts that I might be able to adjust them back, but I'm not sure where these are? And the air bleeders are mostly round from the previous owner and seized up. I'm thinking I need to pull the drums, get to the brake cylinder and work on the air bleeder...