Upgrading the electrical system in our 67 Newport Custom

[66polara]

Well... If you mean dielectric grease, it's not conductive. It's an insulating grease that the connector pushes through. I don't lie to use it on connectors, although on the insulators, I think it's fine.

Cue @Trace 300 Hurst making some sort of comment... I think he used to drive a train...

Dielectric grease it is

 

[MoPar~Man]

How did you ground the gas tank sending unit? I know there are probably threads regarding that but I'm wondering what you did

Drill a hole in the round plate of the tank sending unit (the plate where the gas line runs through, and the active terminal from the float sensor). You'll have to take the sending unit out to do this.

A hole just big to screw in say a 10-24 short bolt so it sticks out of plate. Solder the head of the bolt in place so it won't leak gas. That bolt is your new ground connection to the tank sending unit. Once the sending unit is mounted back in the gas tank with the locking ring, attach a wire to that bolt and connect it to a nearby convienent (and clean) body screw or bolt. Have it follow the sending unit wire up through the hole in the trunk and find a ground connection in the trunk.