Can you separate the drum from the hub?

not trying to be a dick here but

Yes, knowing how to do that is what would be called basic automotive knowledge. If you don't know how to do that part I would hope you have a knowledgeable friend handy to supervise the swap to disc brakes.

Since it's been 20+ years since my 65 Cuda had front drums I cannot remember if the drums are swaged on or not, I believe they are. Essentially, swaged on means a portion of the wheel stud is peened over to hold the drum in place if you look closely at the base of the stud where the splines are you will see the swaging. You have to cut the studs off flush to the drum and press the remains out. Some so called mechanics will tell you that you can just press the studs out without cutting the swage off. Doing so can ruin the hole the stud presses into and thereby the hub itself. Besides you will need new studs to install the discs anyway.