I ordered the cheapie from Classic, though I think the one in my 66 Cuda is working. Dash is out, anyway. The test light shows constant power to the limiter on one post and pulsing on the other, but no gauges are working. I forgot to check actual voltage before I pulled the dash.
Pins are loose and pulled out so I will try and get everything fixed and will use the solid state limiter if Classic doesn't take too long to ship.