separating front hub from drum?

Take the pilot drill out and use the saw over the stud and cut thru the drum only you may have to clean up around the studs with a cut off wheel to remove the remains once the drum is off.
Thanks, I'm having trouble finding a small enough hole saw, the studs are 7/16 I was looking for a 1/2" hole saw but the smallest I could find was 9/16. I guess I'll use that and cleanup like you mention. To be honest I can't really see the swedge on the drum I suppose it's there but difficult to see. All I know is the drums are locked on the hubs so it must be that and I certain they're factory drums. Thanks guys.