I have a 1989 F150 4x4. I recently had work done to the rear suspension. I had a shop(first mistake) put new leaf spring hangers and shackles in to replace the rusted out ones. After a 2 day nightmare trying to find the correct parts I finally got it back and was satisfied with the suspension repair. What I was not satisfied with was the broken brake and fuel lines. Well after talking to the manager he agreed to pay for repairing the lines, but I will not let them touch the truck again(if you want it done right, do it yourself). I already replaced all the brakes lines from about mid truck back included the flex hose to the axle. Now its time for the fuel lines, but I'm stumped. I've only ever had to deal with steel line, which would be an easy fix. This Ford has nylon and its broken in about the same spot on both the feed and return lines. I've never had to repair a nylon fuel line before and I don't want to mess it up. How hard is it to repair the lines? I know there are repair kits to repair sections of the line, and the area that is bad is small, no wider than a 1/2". I've never seen it done and I am completely at a loss here. The guy at the shop said something about having to stick the end in boiling water and then quickly install the coupler to fix it. I have no idea and I need some advice. Thanks in advance.