I had abandoned the fuel gauge trouble shooting and decided to work on an
oil leak at the back of the engine. I tore it down to the bare block and couldn't tell where the leak was. I cleaned the block, added dye to the
oil, put the flywheel/bell housing/starter back on. With the car on jack stands, I started it and watched the gauges for it to come up to temperature.
I noticed the fuel gauge was reading just below 1/2 tank. It has 10 gallons in it. This is the first time I have ever seen it register anything at all. After I shut the engine off, It went to Empty. Turned the key back on, it went back to just below 1/2.
I don't know why it started working, but I'll take it!
Thanks for everyone's help and suggestions.