Not a Pantera, but still a Ford.. This car I built some years ago got fiberglassfenders attached to the steel. It worked just fine. After I cut away the fenders in a similar way to what 4NHOTROD have done, I extended the rear inner fenders out til the fenderopening, and welded them making for one sturdy place to attach the flare. In front I made a bead of about 1/3" in the fender to stiffen it, and I used epoxy to "glue" the flares in place. Roughed up the paint and fiberglass, and screved it together so it would sit where it was supposed to do while curing. Bonded over the holes when it was cured, and the flares survived with no cracks a good "bit" of spirited driving on some twisty roads around where I live.
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