Gas gauges on A-bodies

Last post on this subject. I put the IEquus gauge in and it would not work PERIOD. But when I took it out and put it on the test bench, it works perfectly.
I finally disconnected the ground to this gauge from all the other gauges in the instrument cluster. I install a dedicated ground wire to the gauge from the chassis . I can not explain why, but it works perfectly like this. first time in over 40 years this 71 Duster has had a working fuel gauge.

New gauge and new sender combination.
Thanks, Slantsix64, for the gauge suggestion