I think you'd do better to build or as abve get a pop up truck camper, lightweight and good clearance and you can size the vehicle to your needs.
a B will be way heavy...like 9000 pounds and a rough road will literally knock the cabinets off the walls- in time.
a major part of the B's cost is the cabinetry and the plumbing lay out and systems which you do not want.
My neighbor did a 4x4 conversion on a 99 PW Excel- it was a major operation and he is unsure of the ride on teh highway ( high center of gravity) nor is it really holding up in Baja
Mike
