Thanks for your suggestion. I put in a new regulator about a month ago to resolve issues of unexpected dimming headlights, poor restarting performance and overcharging battery.
I thought I had it licked, but problems still continue. Occasionally, when starting after driving, I get a whole lot of cranking with no fire. Eventually it will start, though many a tense moment as my wife is again about to ask "why did you get this car?" The unexpected dimming of the headlights has been resolved. In addition to new battery, I have new plugs and wires.
The regulator I took out when replacing with a new one looked pretty good. It's "brushes" still had a good 3/8" to 5/8" left othem, so I put it on the shelf.