I have been tied up with so many things, I finally got around to the dashboard lights. What I found is that everything was OK except for dirt and corrosion here and there. I also found that there are a lot of cheap LED replacement bulbs that I found only last for 6 to 12 months. I would definitely buy the $10ea ones from Sylvania. I cleaned everything up with contact cleaner and verified with a digital VOM using the audio sound for clear connectivity.
I also found that the last two vertical gauges, the gas and voltage are backlit very poorly with the baffle design but I wasn’t about to take everything apart again. The bulb was operating.
The easiest way to find the correct bulb is the standard for the industry is 194 which is the nomenclature for the mounting base.
While I was there I also lubed the speedometer which has now been unstuck for 9 months with whale oil because I had some from working with watches, the mechanical kind many decades ago.