67 Barracuda Fuel gauge problems

Hey Guys,

Havent been on here for a while. Hoping someone may be able to give me some tips. I've got a 67 Barracuda, all gauges except for the fuel gauge work. Is there a way to test the gauge without damaging it? Once I know if the gauge itself is functional I can update this post and work my way from there. Any help would be much appreciated.