[SD455DJ]

All the gauges are working fine now and we figured out the culprit was old oxidized connections on the original 52 year old dash harness. Unplugging and replugging important connectors several times must have cleaned them off enough to establish better connections again. The headlight switch was also complicit causing the weird glowing lights and spastic gauge movements and reestablishing a good connection seemed to fix those issues too. It's always the simple things that can stump you, but sticking with it and walking away to clear your head can work wonders. Thanks for everyone's help and comments.

Dennis