Kayak rack question

Try this for the back of the bed. Thule makes something, but it's a double and the front would need to go where the tool box is. Thule does make a crossbar thing that you can attach to the naked roof of the truck. Believe it fits in the door channel. So you could possibly put it in the rear door channels. There are also suction cup type cross bar holders made out there. And you can put those anywhere on the naked roof. Just have to google. Might consider a regular truck rack and changing your mounted tool box in for one that sits more inside the truck and not hang over the top of the bed.