Yes, welcome to the forum, Mekanic. I think Doc built his camper on a U-Haul, or similar. And RanD is just wrapping up the build on a like size box, maybe his is a bit shorter? Have you read his thread about the stealth camper? Ohio, my sister-in-law lives west of Cleveland. We drive over there from MN once in awhile to visit. Maybe we'll get to see your truck. That's cool how you mounted that box to your frame. You've got to check out BlizzND's build too.
'03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio