very nice rig and looks to be in great shape but i think Gary is right: grossly underpowered
as a ex MDT owner i would highly recomend you to look at something with more "balls"
...like a HDT.
the Kodiac cab is just a pickup cab (designed for local delivery).it does not even come close to the ride comfort of a HDT (designed for 10+ h a day driver comfort)
unless you live in a very flat area and drive only short distance i would skip it.
do you know the Racing Junk