Can you say Race car hauler Not mine

Actually I saw this today and thought it would make an awesome hauler. I just haven't seen this kind of Dodge cab before.
http://missoula.craigslist.org/cto/3910258631.html
I think it's a dodge C800 and here is a better pic of what the cab could look like restored

I like how the ad says 2 ton but it says 40,000 pounds on the side LOL!
I wonder if it's gas or diesel.