[dagnabbitt]

I ran into the previous owner of the truck, he likes what I have done with it so far.

My conversation with him solved the mystery of the gas filler being a simple cap. Apparently the truck was stolen at one point and when it was recovered the drivers side fender was smashed. The only fender he could find was one without a gas door, so he simply cut a hole in it and welded in the filler. Honestly he did such a good job you couldn't tell that it wasn't factory.