My 87 had a 3" body lift when I got it and the guys who did it didnt extend the filler hoses at all so they actually pulled the bed over an inch. I think you can just loosen them and slide them up a tiny bit at the tank end, it doesnt take much. I ended up just disconnecting my filler ends from the doors and the little lips on them and the stiffness of the hose kept them in place for a while until I cut my body lift down to an inch, then is was all good.