The bolts are through bolts so if hit from behind it might be ok.... Hit in the corner???? I think your right... not much good... The slider rods are slightly bent like they put too much weight on the bumper.... or the hitch....Interesting, thanks for posting the photos.
The function of the bumper, as a bumper, would pretty much be minimal once it was extended. Nonetheless, it's old school cool!
Does the bumper have the manufacturers name stamped in big letters, visible from behind the truck? That used to be something they did back in the day.