[Ledslinger]

In the thread I linked on page 1, the truck owners that had them were from California and Utah. Possibly the belly pans didn't survive in the rust belt, which would explain the lack of information or sightings of them.

My truck spent its early years mostly in Wyoming, and was likely stored inside except a couple of months in the summer. That could be why my truck still has a belly pan and it isn't rusted away or tossed when it was falling apart.

Also it appears whoever maintained my truck before I got it did no modifications as my truck was nearly completely as delivered when I bought it in 1978.