'38 1/2 ton pickup rear fenders-flatbed vs. box

[woodburnranch]

I am needing rear fenders for my '38 1/2 ton pickup with the regular box on the rear. I came across some rear fenders for a flatbed pickup with the channel on top and have been told that I can easily remove the channel and use them on my box. Any thoughts or insight on this? I would gladly trade them for regular fenders if someone is so inclined. Jim