In case anyone out there is reading this thread, I thought I would include pictures of the adjuster bolts since I was unaware of them before attempting to take apart my rear drums. The bolts connect to the star adjuster plate inside the drum that looks like a miniature muffin tin! These plates engage the cast wheel cylinder gear as Hotrod Lincoln had indicated. In my case everything inside the drum was seized up so no adjustment was possible. Also the front brakes on my one ton ( 250 ) GMC are 12 " by 2" shoes and the rear brakes are 14" by 2 1/2"
