Yep old shortntalls truck can be found in any thread that mentions nbs bumper on obs. Easily my favorite RCSB but don't go messaging him asking how he did it...He doesn't remember, which amazes me. I did the nbs undertaking on my truck a couple months back. You just take the outter brackets off your OBS bumper and replace them onto the nbs bumper and it SHOULD line up, however mine did not. It still needs to come up 1 inch. Another member did the exact same thing on his and it fit though, so that still has me scratching my head. It's a killer mod, looks great but anyway this is kind of an old thread. Doubt the OP is still around wondering.
the more i hear/ read about about your problems, the more i think you bent your frame when you messed up your hitch, or atleast thats the only answer i think of