I don't have it in front of me, but the Salesman's Info book would help with both of these questions. It has drawings of the trucks available, including the stakebeds, though I don't know how much detail they give.
It also specifies the equipment for 1 1/2 vs. 2 ton trucks. Pretty sure it's largely wheel size and suspension, though there may be a difference in frames. I'll check tomorrow.
-Michael
