Welcome to the forum
That wire to the master cylinder bolt is not original. It may be a ground wire that someone added at some time. It is not needed. As for the not idling issue, I would suggest first installing new points, condenser, cap and rotor. The points will need to be correctly set at .019". You may also need to adjust the timing. I would start with 8-10 degrees advanced. On your front drum/hub and bearing issue, I would remove the drum from the hub. If it is still riveted to the hub, remove the heads of the rivets so that you can seperate them. Then it should be easier to remove the hub and bearings from the spindle.