Well, after taking the dash apart, again, I have a, single, dash light so I'm assuming all is well with the wiring and it's just the board.
Time for a new instrument panel. WOOT - I have a New Vintage USA on order. I was going to just do the tachometer upgrade kit from , but it's back ordered and they couldn't tell me when I might get it. I could have put the same kit together from parts, but it was expensive to do. Seemed easier to get all new sensors and new tech gauges for a couple hundred more.
Thanks for all your help!