Heavy wire??? Maybe the truck is different from a car but I'm not familiar with heavy wire anywhere. Are you maybe referring to the rolled edge along the wheel opening? If so it's probable that the body work has stretched the metal to the point where the fender won't hold it's original shape. While stretching & shrinking has been discussed here, actually doing it well requires practice and isn't often in the realm of a DIY project. It isn't something that I can look at your pics and say "hit it here" or "shrink it here". The best advise I can give you is to take it to someone who has experience in body work and have them fix it or possibly arrange for you to help with & observe the process. Good luck.

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