your average rig does not have a dually conversion, oversized transmission, and a gear vendor. Not sure of the stock 250 rear end but this one is a Dana 70. It's also 4wd
To top this of this motor is apparently freshly rebuilt. It has a new radiator, hoses, waterpump etc.
And a freshly rebuilt turbo.
I haven't checked it out as I'm in WA... but i have been doing a lot of craigslisting... and if it all is true, this is not an average f250... obviously as it has the Centurian conversion