Mark, ALL Pantera amp gauges wave to their owners. Mine has been waving to me for 30 years. It's just part of the "charm" and uniqueness of owning a hand-built car. Embrace it! But do make sure you don't have a loose wire too. Normally the needle only waves under a light load. When the headlights or fan motor are on, the needle should be pretty steady. I replaced my electronic voltage regulator with an original type mechanical regulator and that reduced the waving by half.
I guess you haven't noticed the rear view mirror vibrating yet. And if you have a 72 Pre-L like me, a couple of the dash lights reflect off the windshield at night and stare back at you like two little eyes. But I wouldn't have it any other way!
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