If you are going to convert over to electric fuel then you could do a search for e-fuel or electric fuel and you will get many threads on the subject. There are alteast three threads on the subject in the last two pages.
I was referring to your wanting to convert over to e-fuel and what components are used to do that. As far as those rubber pieces on you hard lines they are called vibralock fittings and can be purchased through the dealer or preferrably dieselorings.com. I do not believe the metal lines should move back and forth much if at all. There will be minor play as that is how the design works but they shouldn't move freely.
A forum community dedicated to Ford Power Stroke owners and enthusiasts. Come join the discussion about diesel performance, modifications, EGR deletes, troubleshooting, lift kits, tires, wheels, maintenance, and more!