Fuel gauge Intermittently worked,..now nothing. 66 Valiant

FURY440 said
Not sure about the sender, but I grounded the sender wire to check the gauge and it didn't move.

gauge could be totally shot.
You need to remove the dash, it is not fun. on my dart you need to remove the heater controls and radio plate in order to get to all the screws. not sure about your valiant