Thanks for the advice It helped. I stopped for today at the 36.5" mark and drove around a bit and they still rub in the rear of the well but not nearly as bad as before. I think I'll try and stay at this height and work on trimming the rear inside corner to get the rest of the room I need and then I'll get some pics up.
Any suggestions on trimming that corner I'm talking about? I assume that there's metal behind that plastic.