If you are having problems getting those rear drums off - Prior to breaking out the sledge, you might try...
Jack the rear end up, put it on blocks or jackstands, remove wheels, replace a couple of lug nuts loosely on each side, start then slam on the brakes in forward and reverse. Gets them every time, in fact if you don't replace a couple of lug nuts you may be chasing a drum down the street... (from a post in 2002 by illflem)
I know it sounds crazy, but it has worked for me every time.
T-Bone