Engine is running! Time for brakes.

I will offer the following with a grain of salt, and gladly defer to any guru who disagrees. I had to deal with this question when I was pulling my drums to install front discs. After researching how to do this, here's what I recall. I believe the front studs are swaged into the drums. If you hammer them out, you will ruin either the stud, the drum, the hub, or some combination of the three. The shoulder area where the stud meets the drum has to be relieved somehow (aka grinding) before you can get them out.