OK Tony I read the tech tip. Still don't like the idea of hooking up the alt. to the coil positive. Seems to me if you have a bad diode in the alternator it would continue to excite the coil and wouldn't turn off. Hey it was doing that wasn't it. Tony you may have a bad diode trio in the alternator.
You may want to remove the alternator and have it tested before you go any further.

Its been a long time since I took apart an alt. but its not realy that hard to do. The hardest part is when putting it back together you need to put the brushes back in thier place and secure them there with a paperclip. The factory left you a hole to do this with on the back of the alternator. Just straighten out a paper clip and while holding the brushed all the way in push the paper clip throught the hole and over the top of both brushes, put the back of the alternator on and then remove the paper clip.

I see what realy needs to be done to avoid engine run with a bad diode but it requires replacement of the ignition switch to one that has 2 separate hot lugs when switched on.

What did you do with the 3rd wire off the alternator?

I didn't do it, no one saw me do it, you can't prove anything! "Bart Simpson"