First thing I would do is test to confirm gauge is fried:
https://www.fillingstation.com/articles/fuelgaugetesting.htm

Removing cluster has been discussed on this forum before (e.g.):
https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=1008359


Gord 🇨🇦
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1954 1/2 ton 235 4 speed