Dealt with this a lot because people have no idea about mostly removing the assembley.The drums when replaced were swedged back on with new studs.We used to have the tools at the shop years ago.I had a 61 polara that a so called mechanic puled the drums off with a jaw puller.So bad the pedal would pound up and down when you braked.Found a set of drums from a 60 that fit in a yard.Many have no idea that there is a special puer for them.Still have mine even though i dont have any early cars anymore.Rocky