Once again, I never said that. Reading comprehension is not your strong suit today. A few relief cuts and a few taps from a hammer on the filler panel and it's good as new if the OP can dress the welds properly.
At the top of the filler panel where it is low to the truck lid in the center, he may only need to do as already suggested to stand in the trunk and lift up on the filler panel to make that adjustment.
As with many things, there always a different way to skin a cat. There's your way, my way and there way. Today it became a problem because you don't want to allow someone else's suggestion, and start fabricated untruths and scenarios.