Please let us know if you fry the gauge.
If you do, maybe some members will help buy a new one, and a resistor.

If the gauge does or does not get fried, please let us know - for the consideration of future readers.

If you use this Runtz-style resistor, you will not fry the gauge.
Yes, $12 (delivered) is an expensive innsurance policy for an easy to replace gauge.

I have at least 10 1954/55st used gauge sets, and I do not know if they were only used with 6v, or if they might have been used with 12v. About half the fuel gauges do not work. This means nothing, really, but none of the other gauges have been unusable.