Thanks Mark, Kevin, Northcoast3800, and Fox for your invaluable input. Yesterday, after a setback removing rusted on mirror bracket screws, I switched to removing my gauges.
After doing the bicep curl method, I successfully removed them both. Luckily, about half of the nuts come off by hand, and I used a small crescent wrench, and a 3/8 socket to remove the others! I really needed that win! I can’t thank you enough..

I do like the suggestion one of you made of replacing the stock nut with an easier to remove by hand substitute, as I can see future gauge upgrades once I replace my gas tank, Install my wiring harness, and add a missing linkage on the QuadraJet.

I plan on refurbishing both assemblies back to original look, as well as to work with the swapped in 350V8. Any suggestions on suppliers for gauge restoration, especially 12 V compatible?

Thanks again, I appreciate you brothers!
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Last edited by Winery Truck; 09/04/2021 3:37 PM.