No expert here, but I have had drums go on hard, then after pumping the brakes, the shoes lined up with the drum. Then everything worked. Sometimes the shoes need to skootch around in there to get aligned. But otherwise yeah, sucks getting a tight drum off.
While you are at it, replace that dinky little pumpkin with a 1 ton ford strait axle. You will be rock crawling in no time! Put one on the front too!