I have begun restoration on my truck that has been sitting in a barn for 40 yrs. One rear drum took me 3 hours of banging with a hammer to remove. The brake adjustment screw was frozen. The other rear drum I haven't been able to move much at all. It appears the shoes are expanded, and again the adjustment screw is frozen. I tried a drum puller, and that didn't work.

Any ideas or tricks from a more experienced mechanic?

thanks

I'm not to mechanics, but a lifetime learning who picks things up quick