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It is a 95 or 130 amp alternator from the 90's fords. It is internally regulated, and only requires 4 wires to run. 2 of which hook right back to the alternator. So you really only have 2 wires coming off. The large charge cable, and the green/red exciter wire.
It eliminates all the old wiring, the Regulator and is a huge improvement in the charging system. You can grab the alternator and wiring from a junkyard for less than $30....
I went from the 3G to the 1 wire when my 3G crapped out, for the simplicity and cleaner look. I was running a aftermarket voltmeter so that was already done. I'm not sure what "hard to find" 1 wire parts you will need. I had to make a longer spacer out of some tubing I had laying around the shop. I understand wanting to keep it all Ford, but it was so easy even I could do it lol. I've been burned on too many junkyard alternators so I went with a new one. I still have a 3G on my 67 Mustang and when/if it goes I'll probably go with a 1 wire on it too.
My hardn tom find ncomment refers to the internal regulator and if it burns out , a 3wire is more plentiful than a 1wire regulator or so I've been told.