One wire alternators are GM alternators. In fact, I think the single wire alternator is based off the 10si or 12si alternator.
Everything you ever wanted to know about 10si/12si alternators is right here:
http://www.madelectrical.com/electricaltech/delcoremy.shtmlPart numbers, applications, everything is in this link.
If you need any help, let me know. I've wired these up a few times. I've got a 90 amp one in my '57 Chevy truck, and I've even thought about wiring up a 90 amp one in my Challenger just to get rid of the "Chrysler alternator flicker".
Heck, if Sam Posey's race T/A Challenger had a 12si, it's got to be good, right?
