I understand that the width of the fenders and the wheel arch are the basic differences. I would say that the patch panel for the smaller trucks would be a good starting point. Depending on what you need to patch (mounting to cab or lower rear wheel arch), you may be fine with it. If you need to repair the entire rear section you may have to splice in a piece of metal in the middle to accommodate the wider fender.

I've run across quite a few "big bolt" fenders in my short time of scrounging. You may be able to find a complete replacement in better shape than yours.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.