I just unbolted mine and moved it as far forward as I could until the frame started the upward bend. There I drilled new holes and mounted it. I ditched the rear bumper and cut a piece of diamond plate to cover the bumper area, this allowed the furthest most point of my hitch to be almost flush with the end of my bed. For most rule books that is about all you can do and be legal. Hope that answers your question.
I don't know how to raise the hitch height other than turning your receiver over though, I just run bigger tires (35's) and a 26in. hitch height isn't a problem.