Update on the flickering and dimming issue. I used my meter to test the voltage in the charging system under as much load as I could get.
Turned on the interior and exterior lights, the heater on full blast, the radio, put the car in reverse so backup lights were on, opened the doors, and even opened the glove box so the charging system would be under as much load as possible. My battery tested at about 12.5 volts before I started. The alternator was also throwing at the about the same voltage. When I put the car under electrical load and had someone give me a few more RPMs than idle, the volts the volts did not change. So, I started looking at the new voltage regulator that I installed a few months ago. I noticed that there were only a few strands of wire left on the case ground wire and the insulation had worn off because it was rubbing on the corner of the VR case. Probably been that way for decades since it appears to be the original ground wire and the way it goes around the VR case is not the best design since it is prone to rubbing off. After I repaired the ground wire and made sure we had good ground at the VR, I am now getting almost 15 volts under load on my meter. Best of all, no more flickering or dimming lights. Just goes to show that you really have to look closely at a lot of things and the smallest and least expensive fix can make a huge difference. Thanks to all of you for your suggestions and help. I am sure I will be back with another request soon. Keep up the great work.