Zip,
Had a friend that had a 1 ton with the 6.2 in it. He pulled a 24' enclosed with a RED it was kind of a DOG on that chassis. With the xtra wieght of the MH chassis, if you get into any hills you may have a problem.
I had a 6.5 TD in a 1 ton crew cab. That motor works very well with the turbo. 28' enclosed with a 3000# door car, was no problem! Not sure you would be happy with the 6.2 Whats the ad # on E Bay
Just my thoughts
Dave