Couple of questions on sheetmetal/bodywork
Boy, that's a tough one!! From the first pic you posted it looks like you need to raise the crease (body line) on the rear quarter so that it will line up with the same crease in the door BUT the crease (body line) on the lower door is lined up so raising the quarter panel would mess up the lower line. It almost looks like you need to split the quarter panel (horizontally) somewhere between the two body lines so that you can leave the bottom half in place and still move (push) the upper crease a little higher to line up with the door. The quarter seems to be attached in the correct location at the very top because the very top part lines up with the top of the door.
Could the door be messed up? If the door hasn't been modified I'd say that the quarter panel was made incorrectly....but without seeing it in person I can't say that with any certainty.
A cut off wheel would easily cut a slot horizontally so you could raise the upper body line without moving the lower line and without moving the very top area. Does this make any sense???
Treblig