Hang on a minute -- Are you having a hard time removing the rear drums?? Did you remove the flush screws that hold the drum to the hub? I didn't notice anywhere above where they had been referenced. If you have not removed them, you can bang, pry andsqueeze all you want and all you will do is damage. If you haven't already, stop everything and look for the screws -- on the face of the drum (flat part in between the lug bolts somewhere) they may be crudded over so you have to dig for them.. They will be hard to loosen (I use an impact driver for this). Your drums should then come right off.
