Looking at the back of the alternator, you see the big terminal that goes to the battery on the far left, a single terminal in the middle, and a plug on the right with three wires.
On my car, I simply...
1. Jumped the plug's left wire over to the big battery terminal.
2. Jumped the plug's middle wire to the single middle terminal.
3. Jumped the plug's right wire to a wire that gets powered when the ignition is turned on. (ignition wire on the solonoid)
THAT'S IT!
I was able to stick the old pully on there without any grinding or spacers. I was able to use the stock brackets without having to modify them. EASY swap. A 3G should look like the ones in the picture, and do NOT have an external voltage regulator. (I took all that off of my car too.) They have an internal fan, so an external one is not used. It does not squeal, and charges GREAT, even at idle with ALL the electric accessories turned on... and my car has a tiny 4-1/2" moroso underdrive crank pulley!
HIGHLY recommended modification.
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Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220