1968 Dart gauge help

Well I tested the gauge with a meter this afternoon and no continuity so I pulled it out and pretty much think I found the problem. Kind of a wimpy piece of cardboard for an insulator protecting it from the housing. I think when I reinstall another gauge I will use maybe 5 or 6 layers of tape or a piece of plastic to insulate next time. Thanks for all the help 67dart273 and everyone else for the shout outs..
Do to my rudeness when originally posting I will now include a few pics of the daughters ride to school for the next year or so. 360/904 with mild comp cam(440 lift), edelbrock performer, and holley 600 Street Warrior carb. Mopar or no car...

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