Garsh, I hated the factory steps. Staight into the dumpster they went. The amount of leverage and flex on the body is something to see when I step on one.
The only thing the factory steps did for me was:
-get covered in goo/ice and cause me to slip and fall and shoot vertebra across parking lots. "Could somone bring me back my back please, it's over there."
-get covered in road goo and ruin a perfectly good pair of Bills Khakis
-trip me as I try to step over them
Just learn the handle hop pull up like every other driver. Body mounted steps are big time damage multipliers.
Every frame mounted rocker guard for the Superduties I saw that actually worked was custom hand built. Good luck. I'd love to find a thin box version that followed the bottom of the body, and didn't stick out much like a step deos.