Going thru a project car I bought to see what's what. Troubleshooting a fuel gauge problem (fixed) and discovered the sending unit was replaced with a modern two pipe affair. Two questions. 1) I'm not using the return pipe and want to find a more attractive way to cap it off than what's there now. Anyone know where to find proper 1/4" line caps that are compatible for fuel applications? 2) Should there be a ground jumper to span the hose gap between the sending unit pipe and the fuel line?