Here is what I did with minimal expense. Get enough standard 8x8x16 cinder blocks to dry stack four 16x16 piers on each corner of the truck. Jack up the truck, set your piers under the frame rails, and then place a stout 4x4 or 4x6 perpandicular to the frame and set the timbers on the cinder block piers. Make sure the truck is level as any slope will compromise stability. After the truck is set on its piers but with the wheels still attached, push the truck by hand laterally to make sure it is stable. Once you have determined that your dry stack is stable, proceed with the reat of the work. I spent many quality hours under my 8000 pound truck using the described method. Good luck, and don't make any shortcuts as people are killed with vehicles crushing them. We all want to see your beaming smile in front of your finished project, not read your obituary.
