There really wasn't a solution just more of the same back and forth. I posted some pics and after that I tried to get it perfectly level but with no luck. My Chevy bed is slanted to the rear and closer on the sides in the rear than in the front. That was my answer. Good luck with yours!
Now it's slanted front to back? Pretty sure you said the bed is the same depth front to back.
But you see this is the problem with dredging up old threads and hijacking them with your own "related" question. You end up getting lost in the original content.