How about hinges on the rear of the bed with a hyd ram (dump truck style) then simply raise the bed and work on any rear end parts.....(Just my oletimers kick'n in.) Ya could haul more weight than the bed would hold.

keep on trukin'-
\'50-something Chevy 1/2t
\'31 Chev 1.5t
\'53 project 3/4t
\'57 1/2t
\'64 3/4t