I could have repaired the threads in the coupler plate, but the jack would still be hanging down in harms way, so I made it removable. With it removed, I can't drag it.
I mounted the jack to a 1/4 plate. Welding tubing to the coupler and plate gave a sort of hinge pin arrangement. two pins slid into the tubing holds the jack in place. pull the pins and the jack lifts free.
The four 1/4 inch bolts act as set screws to snug up any play in the mount. Lightly twisting them down with fingers kept the whole thing tight. There's no wobble or play while the tear is sitting on the jack. I'll replace them with thumb screws when I get a chance to pick some up.

No dragging the jack now.

One advantage I hadn't anticipated, is now I can fully lower the tailgate on the truck while hitched. That alone is worth the modification.

Took the tear camping last weekend and tried it out. Didn't do any off roading, but everything worked fine. I do need to get some matching paint and touch up the whole area.
Sam