On one of our cars I clamped a copper wire in place of the old fuel line ground clamp, worked very well.I just replaced the tank on 1967 R/T due to seepage of factory welded seam. It has always done this on my 30 year old tank to a lesser degree. It got worse last year, and always smelled gassy. I have had an intermittently working fuel gauge for a long time, and changed the tank sending unit a while ago, with no improvement. When I had the tank out last week, I decided to run a ground wire to the body, instead of relying on that stupid factory ground strap that counts on the fuel line to frame mounting clips to complete the ground circuit. I soldered a 14 ga. wire to the one of the spring clips that I snipped off the strap and clipped it to the sender outlet. I soldered a ring terminal to the other end and secured it to the shock absorber cross member with a self tapping screw. I know it is not factory, but my gas gauge works now. If anybody is looking up under my old girl's skirts to notice that, they are just too darn close!
What size rubber fuel hose is that on your sending unit to your fuel line?