66 Dart gas Gauge

Coalman, Not sure what you are referring to with a new headlight switch?? Can you explain? I replaced the switch during the build so it is new.
Well last night I checked the wiring from the kick panel to the dash connectors. I found everything to be ok, however I also found that the wires inside the connector could push backwards allowing them to slip out the back of the connector as you push the plug over the dash terminals.
I put dielectric grease on all the connections . Then I put the connector on making sure the wire terminals stayed in place. Put the cluster back into the dash and tightened everything up. Went back to the tank and connected the wire to the sending unit.
Now its time to see if the gauge is going to work. I pulled the cut off switch to supply power, sat in the car and turned the key on and wollla! the gauge moves to about 1/8 tank. Thats probably correct because the last time I drove it I ran out of gas and I put in a few gallons to get back home where I parked it and said the gauge needs fixing before I do anything else.
So I can now cross this off my to do list!
Now to move on to other issues which include, shielding fuel lines from heat, figuring out how Im going to run a speedo cable around the headers, installing seat belt harness, rewiring the one wire alternator.
Again thanks for all your help in getting this issue resolved. I appreciate all the help
Rod