[dsraven]

I did something like that to mine as well, a fender fill. I used a reshaped fill door from another newer vehicle and welded it into the fender making sure the door would open without hitting th box rail. then I used the filler neck from the saame vehicle as it comes with a built in vent hose connection and a screw clicker cap. not sure if it is a vented cap but that is not a problem with my system.