8.8 swap
Leaf relocation lines up the springs directly under the framerails. There should still be room for the tank. Your shackles at the back go through the framerail with this mod. Theres holes in the framerail at this location. You put tubing thru these holes and weld it to the framerail, then install your shackle bushings and shackles making the framerails your shackle mounts at the back.