Fuel tank sending unit ground strap
In my opinion, the original ground strap was poor thinking. After all, "whut" grounds the fuel line? You're talking about a rusty, sometimes undercoated tube that is only held to the car by some cheap clips here and there. Why would the fuel line be any "better" grounded than the tank/ straps?
Best way to ground this is probably.............
If you have the sender out, solder a ground pigtail to it
If not, clamp a wire to the outlet tube, or solder an additional pigtail to the original ground jumper, then ground the pigtail to the body