I also found this bumper and a WARN 8274 (?) in my dad's barn. I really admired it as a kid.
A friend of his made it out of steam pipes.
Once my dad accumulated 480,000 miles on his 1980 suburban, it was retired as a farm truck until a heavy snow fall caused the barn roof to collapse crushing the truck. The truck sat in our field for a few years until he finally scrapped it. Luckily, he had cut off the bumpers (there is a matching rear also) before the truck was scrapped.
I picked up a barely used WARN cable for $15 yesterday from a guy who switched to a synthetic line. Hopefully, I can resurect the WARN.