Forgot to mention that on Saturday I removed the rusted passenger's-side running board and its brackets. Chrome-plated running boards were installed as a factory option when the truck was built.
This one was rusted so badly that I would soon have been concerned about it failing when someone stepped on it to enter the truck. The driver's side so far is showing little rust by comparison, so I'm leaving it on for now. The chrome-plated boards are rust-prone even in areas that don't use a lot of salt in the winter as I've seen several other Rangers with these rusted.
When I looked at the brackets a few years ago, I had the impression that Ford had attached them using some of the critical body bolts. Turned out this wasn't true, and the brackets used dedicated bolts that did not affect anything else when removed.
The brackets needed to be removed because they project from the side and could conceivably injure someone who walks too close to the truck. The rear bracket was a pain to remove because the bolt threads had been coated with blue thread-locker, and for two of the four bolts there was no room for an impact driver. Ford had done its common practice of using too long a bolt, which meant several more complete turns of the socket wrench with a lot of hand force to remove the two problem bolts.
The front bracket was easy with an impact driver because just two nuts held it. I reinstalled the nuts on the studs, which are attached to the same piece of metal that is trapped in a channel and cannot be removed without major surgery to the truck. Reinstalling allowed immobilizing that piece of metal to prevent a rattle.
Even if I had wanted to keep running boards, no aftermarket one in searches uses the factory brackets. Aftermarket ones all use proprietary brackets that have to be installed by drilling holes. A few years ago Ford still had available the replacement factory chrome board, but the end caps were not available and dealers wanted $1,000 for the board alone. Now stock has been depleted and the board discontinued.
The board was rusted junk, but I have kept the brackets anyway just in case. If any of you want the two right-side brackets, let me know and I'll send them for the cost of postage/shipping. My Ranger is a four-door SuperCab, and IIRC the rear bracket is different from the one for the two-door SuperCab.