I think its good information from someone who is more than qualified to give it. Thanx Daryl.

Creekbob, your fuel pump likely came from a 400 car that had a return line. Its very common to just the extra line. As crazecars says you may as well replace it with a 2 port when the fuel pump finally fails. You could just tighten 'er up and run it and keep an eye on the "hillbilly plug", but I'd change it to a 2 port so there isn't puddles under the car again. Its a bit of a fire hazard. LOL !!!