I am going thru that same problem right now. My bed is 31 inches tall with the sides at 53 inches. The hitch has been extended by the previous owner. So it clears the rear end but the distance between the bed and top of bed sides is barely adequate, and the truck does not pull level, see pic in my other posts on this site. I need to rise the axle
but unsure about cost. I looked at buying a new Toyota Tacoma but it is just as high as my 1/2 ton Ram and has a composite bed. If I had it to do over I would just buy a bumper pull, it would have been easy and simple to hook up and could be pulled with anything. I attached pic of my extended hitch. Happy Trails.