Ran the 1/4" ones for years.
I never got the inner screws in place on the drivers side, never got around to pulling the drivers side tank to do so. After a few years of running I ainted the truck and during prep I welded nuts to the body and changed to button head allen screws (countersunk would be better)
They are full length, you do need to cut to match the cut rear fenders.
If I were building another to play in the rough stuff I would do it again. The 1/4" stuff is weight down low and centered over the vehicle. I will even say I felt the body was a bit stiffer after bolting them on the first time. Hardest part, getting the lazy UPS driver to pull them off the truck and leave them behind. They rode the truck for 3 or 4 days. I had Chuck complain to UPS (since he was the shipper and that is all UPS cares about) and UPS ate the shipping charges for the delay. These are parts I don't think UPS could damage (although they may damage other boxes on the truck, don't order wine glasses to be delived the same day).
I did use them hard. I used it as a high lift point to pick the whole side of the truck at once. I slammed down on them hard many times. When I did the paint job one of them had the slightest hint of a dent that could only be seen looking down the edge while off the truck. Chuck wanted to see it because he had never seen one of the 1/4" dented before. One the truck you couldn't tell. I know it saved the body and kept the doors functional. I have seen plenty of unprotected Broncos that the rocker and door sill were bashed up several inches.
Personally, the best part, it keeps the Bronco body lines. Looks stock. Not a grafted on chunk of industrial box tubing.