Hiring a wrecker with an extendable hydraulic boom would be some cheap life insurance, and it would probably also minimize the risk of damage to the frame or the dump box. Have some type of support structure ready to install as soon as the lift is made to prevent paying for "standby time" as you cobble up something to hold it up safely. Sometimes shade tree methods are just too dangerous to even consider.
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!