[Kurt in NJ]

There are 2 different styles, one the drum is outside the hub, the other is like yours, on both kinds the studs are swedged in and just pushing them out will distort the hub.
The drums on the outside are easier to cut swedge because you can cut into the drum and not worry .
Usually takes a press at least 25 tons to set the swedge
Before you do anything check if you can get drums for your style hub