Grounding the Fuel Tank Sender Unit

[ChrisMinelli]

I’m working on getting all the instruments in my 52 Plymouth to work and after replacing and fiddling with the tank sending unit I grounded it with a jumper wire and the fuel gauge worked like a charm.  The manual seems to think the retaining ring itself is enough of a ground for the unit.  I’ve cleaned and tightened it and I think the tank itself is no longer grounded.  (It’s on my list to replace but until then I’d like a working fuel gauge). 
 

Is there a place I could run a ground wire to in the trunk?  My initial thought is that I could just ground it to the trunk but I don’t think drilling above the gas tank is a great idea.  Could I run it through the taillight hole and ground it to the frame?  Anyone solved this problem before?  Thanks.  

[dpollo]

Slide under and run a ground lead from the frame to the steel gas line.

 

[Sniper]

3 minutes ago, dpollo said:

Slide under and run a ground lead from the frame to the steel gas line.

 

 

Later model Mopars had a factory jumper that grounded the tank so this should work.

[JBNeal]

What is your path to ground?  The shortest path is the best, through the fewest number of mechanical fasteners...for optimum performance, the battery grounded to a starter mounting stud improves cranking speed, and from there a ground strap can be used over to the nearest frame rail to turn it into a buss bar where the sending unit can be grounded ?