Put the transmission in high gear, and pull the spark plugs. Gently roll the truck forward or back, and the engine will follow. We used that method to adjust valves and do other chores requiring turning the engine in the pit area of round tracks for many years.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!