I'm with 69Cuda in needing some education on why you would want to have the truck sit for an extended time on anything other than its suspension/wheels and tires? The only reason I can think of is to prevent flat spots on the tires?
When I deployed to Okinawa for three years, I left my '70 Chevelle in Dad's barn (wood floor). I removed the expensive tires and the Corvette rally wheels (put each one in a large garbage bag and fogged it with tire preservative) and put the car on four old wheels and tires I got from the junk yard. After three years, put the good wheels and tires on and drove the car away (how I set up the engine and tranny for long-term storage is beyond the subject of this thread). No issues from sitting so long with stresses in places other than where they were designed to go.
