at the amount of work your talking about, why not make a custom tube chassis to get everything where you want it, then drop a kick shell onto it.  
HMM, independent front/rear, why not get an entire yota drivetrain engine and all.  Swap on an independent rear set up and then do custom double A arms to get the lift/width you want.  
could be almost less work to build the structure you want with a wheelbase for a kick, and then just figure out how to mount most of the body to it.