Compare length along the surface and hole locations to your front bumper. Is it possibly the same bumper with the arch removed? Or same arch, same bumper?
It is flatter than a front bumper.
It matches the contour & specs of the pickup rear bumper but, it is thicker as described earlier.
I layed a front bumper on the ground under it to show the difference in curvature.
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http://pic20.picturetrail.com/VOL1568/13678754/24528751/413983524.jpg[/img]
No way is it a flattened front bumper as it is nearly 1/4" thick spring steel.
Would would need a hell of a press & die to do that without kinking it.
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You can tell by the curvature of the bumper John has pictured on the rear of his truck... is in fact a front bumper.
{ That's why he had such a hard time trying to getting it to fit the rear bumper brackets }.
https://www.stovebolt.com/ubbthread...umber/3535/filename/Bumper-installed.jpg.