One thing the truck is sorely lacking is storage space. Putting stuff under the seat is a recipe for being smacked in the ankles under emergency braking. I had an old crate in the bed to hold various ratchet straps, bungee cords, tarps, etc. The problem was it would slide around when driving, and everything got soaking wet in the rain.
I bought this tool box at the flea market for all of $5, I liked its design, and the somewhat battered look suits the look of the truck quite well. I knew it would stop the getting wet problem, but I needed it to both not slide around, and to make it a little harder for someone to steal it.
I bought two wing screws(like wingnuts, but screws, I didn’t know this existed before I found them) and some nut inserts for wood. Then I figured out where I wanted the tool box to be(making sure to position it so the lid could open), and drilled two holes through the bottom of the and through the wood of the truck bed.
From below I hammered in the nut inserts, I went from below so they wouldn’t just get yanked out if someone tried to pull the tool box up. Turns out I didn’t get the holes completely straight which made getting the inserts to stay properly was a pain.