Bed cargo volume?

[rainamy]

It's raining quite hard here today, and my long bed is parked outside (of course) so I cant try to measure it.

Does anyone know from some old ad brochure or the like that the cargo volume of the bed box is? Assuming a flat, non mounded load, and not adding slats to the stake pockets. I've got no idea of the height, the width/height of the wheel tubs, and the height from floor to bedrail.