If you keep a Hi-Lift in there, remember that if a tire goes flat, you need enough room to slide that think out of the tool box. I learned that lesson the hard way when a tire went flat while I was parked in the parking lot at work. I had to move the truck back 15 feet to get the darn jack out.
Worked out for the best because the bead got loosened up that way. Kind of hard on the tire though.