All you need is a straightened-out paperclip to hold the brushes back while you clock the rear housing to the position you want. Just be sure to keep the stator and the rear housing together.
Jerry
And where exactly would I put the paper clip?
Update! Never mind. I just opened up the case and the brushes popped loose. I got it all back together just fine. On another note, after watching those videos I see where he says you can excite a self exciting alternator by briefly supplying 12 volts to the #1 terminal. That could be done with a simple push button located on the dash or hidden somewhere. Of course it might not be needed at all. Just another way to get the alternator excited without revving the engine.
