I mentioned something recently on another thread about pick up cranes/lifts involving an a-frame set up possibly using the rear stake pockets. Someone pointed out the SP's were not set up for vertical loads and they are not. However, that part can be overcome with a little ingenuity and engineering.
So, my idea (and I'm gonna do it) is to make up a collapsible a-frame that will span the 2 pockets. It will have a truss bar to keep it from spreading and placing any side loads on the pockets. At the top there will be a ****** block as well as a hoop or ring. This crane will need 2 winches or a way to switch over.
The primary winch will lift the load through the block higher than the tailgate. The 2nd winch will serve to stand the frame nearly upright so the load swings over the tailgate. There will be safety stops to keep it from swinging past vertical, but they will be removable in order to lay the frame forward for short hauls. I will have to weld some ears on the rectangle tubing that goes into the pockets to provide the pivot and make a socket that forms the "A" at the top. Then bolt in the cross brace high enough to clear the load.
Why all this? I think the materials needed are minimal, like the whole thing can be built with one 20' stick and some bolts. And it will break down and lay flat on the way to the pick. A hand winch should be plenty for both lifts but I have a power winch laying about doing nothing. A chainfall or come along will also do the job. Lots of versatility here. It will be faster than a hydraulic pump with a greater height capacity, as high as I want to make it.
I'm not expecting to lift more than a couple hundred pounds but will build it strong enough. Pics are scarce on the web but this one captures the basic idea.
I can think of several ways to approach this but before I get the welder out, give me your thoughts.