Mike,
I do think that the dash lights were pulsating before the MSD swap but I do not recall if I noticed the ammeter/volt gauge fluctuating at that time. I added the dash light issue onto my Winter list a while back but I did not think about it being the issue of the ammeter until now. I have checked and rechecked the wiring for the MSD and I do believe that the MSD install is now good. When I saw the dash lights fluctuating today, that got me to thinking about the issue just before I parked the car for the Winter.
The guages are mine and I can trace the dash wiring fairly easily.

MSD Note:
I can already see the difference in how much easier the car starts with the MSD installed. The engine has started right up each time I have started the car even in the cooler outside temps. It will even startup without touching the accel pedal. I never had that with the orange box or the two FBO boxes.
Thanks for your reply.