Front Drum 71 Scamp

Unlikely your drums have never been replaced. Squirt penetrant oil around the studs and hub, on inside too. Find a remote parking lot and throw the drum down hard many times, so it hits flat on the inside of the drum. Eventually, the hub will fall out, taking the studs with it. If no swedge on the studs, you can then put a nut on and beat them thru the hub, with a long socket supporting the hub. If a swedge or anything that might bugger up the hub's slotted hole, cut the studs off fairly flush and then beat or press them thru. Hollowing them out with a drill first would help.