removing 9 inch brake drums from hubs

I have never had 9 inch drums on anything, but I'm trying to help a friend fix the front brakes on her 1965 Barracuda. What is the recommended way to separate the drums from the hubs? I presume that it means pressing the studs far enough down in the hub to release the drum? They don't appear to be swedged and the ones on the left side have been replaced at one time with Dorman replacements to get rid of the left hand threads.