Yes I was taking a reading at the tank sender unit.

Glad to hear the ohm reading is correct.

Where did you ground the gauge to the cluster? I thought it only took the wire from the ign side and one continuing to the sending unit...?

The sending unit is indeed grounded to the cab as well

Thanks for all the help

54 3100. (pops truck aka my nightmare)
49 3100. restoration project
02 2500. diesel 1/4 mile truck
82 shovelhead. bobber in the making