Ive got he same rig, but stock. So Ive got the TTB D50, not so tall, and stock sized treads. Flatbed though.
Ive been retrofitting this camper to fit the flatbed.
This vintage F250 is a GREAT platform. many will tell you that it is the last of the "real trucks". Simple, and tough as nails.
Ive got more than 250k miles on mine now, with no problems to write home about.
Be prepared to drop some coin for simple things like oil changes though. It will run you $60+ This beast takes 14qts of oil.
And tipping the scales at nearly 8k lbs, I rotate my tires every oil change. A bit of a hassle, but when you have $1k worth of Load E treads on it, it really helps tire wear.
Where do you live? Does it drop below freezing? If so, you will have to service the glow plug system if it hasnt been done in the last 50-75k miles or so. Glow plugs and Glow Plug relay is all that is involved.
Im assuming it has the automatic trans? If so, the model is a E40D 3-speed + overdrive. Very good autos actually, but they do have a service life of less than 100k miles. But keep them topped off with fluid, and they will perform great, unless you are pushing much more horsepower than stock.
As far as the turbo o-rings, if you are going to get into that, be sure to purchase the entire kit. I would hate to replace one leaky o-ring, when the one less than an inch away could fail just 5 miles later. there s a decent amount of labor involved, mostly laying face-down on the engine under the hood.