The ammeter in my son's 73 C10 was not working, so per the suggestions here on the forum, we decided to swap in a volt gauge from a newer truck. It works very well, and we are very happy with it.
Although we made a few mistakes, we finally figured out a very easy way to do the conversion, so we documented it. You can download it here:
http://www.73-87chevytrucks.com/techinfo/Electrical/73C10AmmeterToVoltGaugeSwapR1-0.pdfPlease let me know if there are any changes or improvements we should make.
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