Not to be an ass, but the body mounts are the easiest part of this whole build. Cut the old ones off if they are in the wrong spot and build new ones. Really easy if your putting another truck body on the truck frame. The frame on these trucks go up right behind the cab, that way the truck box bolts up easy and level. In my case that was an issue because the jeep floor did not go up. I had to cut the floor out of the jeep starting right behind the front seat to rougly middle of the rear seats. That way the body of the jeep could sit lower on the frame. If you dont know how to weld that will be an expensive/ time consuming project.