Here's the bumper overrider altered for the CR mount bolt spacing. I made the extra plate from 1/4 flat scrap. First step was to drill out the upper threaded hole such that a 7/16" bolt would fit and turn freely in the hole. It was threaded for a 7/16 bolt to start with. I then drilled and tapped for a 7/16 bolt, and bolted the new plate in place. I then drilled out the bottom hole all the way through the new plate so that I could thread it for 1/2". I then center punched the top hole in the new plate 3.5 inches from the bottom, drilled and tapped it. The new plate needed to be slightly bent (put in vice and wacked with big hammer) so the two threaded rods that mount the bumper overrider would run parallel to each other.
It took about an hour to design and make the new plates.
I did also re-polish the new overriders as the shine wasn't up to my standards.