Looking good! I'll bet that with a little dedicated tinkering, it wouldn't be too difficult to assemble a square tubing subframe and add a couple of lift cylinders to convert a regular pickup bed to a dump. I've seen some conversions that used a power steering pump and a big fluid reservoir tank for hydraulic power.
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!