There was a really thick spot at the top right near the latch post. I cut out that spot, its right on the edge..
I totally cut off the fiberglass taillight tabs too, but I left the sheet metal taillight mounts welded on the inner bed frame and just cut them off the OE bed side.
I loosened up the clamp on the filler neck and was able to get the existing hose to reach but I think the vent hose went flat because gas pumps shut off.
I think both hoses need some work to work right.
I cut that bigger part off as well, but perhaps I didn’t get enough. I’ll go look into that area again this evening. I have quite a bit of material left to cut, but I’ll probably have to take it to the edge as well.
Hindsight, I wish I would have done the same, and left the factory tailight tabs. At this point I am just going to have to make my own.
I’ll look into the hoses and let you know what I work out, assuming I get to it before you do. Good info on your part though.