You guys are dragging me back to my collage days. I don't think the average Joe thought in these terms back in the day. Interesting none the less.
I must admit I never favored DC generators even back in the day when cars came with them. When they worked they worked fine but when you had a problem it was usually a head scratcher. I don't think I can add anything new except that there was mention of a frayed wire.., I was wondering if this might have caused some other less noticeable damage to the generator.
Have you read the following: Also a good read.
http://www.1948plymouth.info/SupportPages/PNWR_Reprint.pdf
Good luck, Chet...