Here is the swap I mentioned. I thought I had a picture but couldn't find it. Turns out I had emailed myself the link. This is an alternator upgrade. I'm not sure if for a weldenator you HAVE to have a second alt or if you can just isolate the one you have from everything else. If you can get away with one you'd need a larger one like this.

Interesting note: The heated windshield on a Caddy must be serious business if it's powered directly from the alternator. That's my kind of car.

http://ttora.com/forum/showthread.php?t=144170