Here are some pics of my budget Hi-Lift jack mount. First, the whole thing:
Here's a closeup of the front and back with jack attached:
And without the jack...
The "pins" are grade 8 bolts with the head chopped off. On the front I just drilled a hole in the stake pocket and put one nut as far down on the threads as possible, inserted the "stud" into the stake pocket and put another nut with a lockwasher on the back. In the rear, I drilled a 3 holes and put a corresponding "doubler" plate made from 1/8" strap. Nuts and lockwashers are used inside the stake pocket like the front. Base of the jack hangs on this stud and front part of the jack has a piece of mudflap that goes around the nut to keep the jack from banging into the stake pocket. You can see the little piece of rubber in the pic, it is sitting on the wheelwell in the closeup without the jack. An old drum brake retaining spring (not the tapered one), a washer and hair pin make up the rest of the mount. Total cash outlay, $3. Addin a little lock to the pin makes it theft proof as well.