I set it on hockey pucks to raise it up high enough to clear the floor mounted seat tracks, used a 7/16 - 20 bolt into where the seat belts go and two J hooks into the footman loops in the floor. I also cut some fuel line I had laying around and split it down the side and put over the edge of the seat tracks in case they did hit the bottom of the tool box, so it wouldn't rattle. It works out really well. I've since put a sleeve over the threaded part of the bolt under the tool box so someone couldn't turn the bolt out with pliers. It holds quite a bit.Great looking LJ, did you use the seat mounting bracket locations to bolt in the tool box or just mount to the tub?