[LT7A]

Wow man, you're doing such a tight, clean job that you're almost a victim of your own success and abilities. I know that doesn't help much. Here's my train of thought for what it's worth. Being that 85% of the truck is aligned, I don't think I would want to put that rig on to a frame table and try to tweak that section back into alignment. If you are going to consider re fixing the fender to get your gaps where you want them, I would first fix the frame permanently. It sounds as if you might be able to cut the bent area off and either re-welded it in the correct location, or more likely, and probably better, to get the horn off of an un-bent frame, preferably longer than you actually need, for comparison's sake. Maybe all the way to the firewall? If you don't fix it now, when you do, it may once again disrupt the fine detail work you've done. Once the frame is fixed, you may feel better about whatever you have to do to the fender because you know it is permanent and the last time.