This was an interesting one to work on. A friend says he wants to make a tandem mini-truck, add another axle to the back and extend the bed. I have already built 2 of them so I figured why not.  it will be fun. Not the easiest thing to do, but I love a challenge when it comes to customizing something.  So we bought a junked Mazda truck with a good bed and frame and cut it in half behind the cab.  Spliced the frame together along with some extra framework. Added a 3 link and a pan-hard bar and we were set.  He painted it rat-rod style.  Different for a mini-truck that's for sure.