I made a 1/2 dozen trips to the Glamis sand dunes with both my first 1986 22RE longbed automatic and my 1985 22R shortbed 5-speed. I REDLINED those engines a-l-l daaaay loooonng!! Before each trip, I went over the entire truck with a fine tooth comb and tuned the engines to within a gnat's a$$ of right-on! Fresh oil and air filter. I added a 1/2 can of STP Oil Treatment to crankcase. At the dunes my tires were air'd down to 4 PSI. I removed every pound I could from the truck, including tailgate and spare tire. In my 85 I installed a 5-point harness, but in the dunes I could only use the lap belt because the bouncing in the seat would beat the crap out of my shoulders.
Geeezz.. .those were fun wheel'n days!!!