separating front hub from drum?

I'm not doubting your experience, it sounds like you have done this before but 5/8's even for the 7/16 studs? Well I can find a 5/8's easier, so do you have to cleanup around the studs as BCSCHIEF mentioned with a grinder? Do you recommend a certain brand hole saw?

Thank you.

I think if you look at the stud, you'll see the threaded area is narrower than the knurled part that presses into the hub flange.