Unfortunately when I was looking for a truck big enough to sit under my camper, the 450 was only available as a cab n chasis or as a 4 door crew. I didn't want either, I had grown quite attached to my Chev 2500 extended cab with full bed and I didn't want to surrender that extra room or go with 2 extra feet of truck. Now as of my latest visit to the dealer, the 450 is now available as an extended cab. I would have jumped as they carried over all the same options as the 350's. Mine's a Lariat and it is definitely not a work truck
, although I occasionally hang an 8 1/2' commercial plow on the front. Can't beat shoveling snow in a heated leather seat listening to the sat radio over the whine of a twin-turbo diesel. YeeHaw!