Make sure when you look at that Diesel Truck you do your homework. I see quite a few that will tow not much more than your 6.0 I like the Ford SRW F-350 with the Diesel but you must be careful because with the 4 different gearing options, bed lengths, cab options, and 8 or so suspension packages its tow rating can vary 5,000# or so. What I am saying is just because it says F-350 or what ever on the side does not mean squat.
Do your homework!
Chris
Chris,just to clarify,the f350srw diesel since 99 doesnt have a gear ratio option...3.73 only until the newest 2010 trucks. Only way to get 4.10 or 4.30 is drw,and tow boss packages...IMO,for personal use,none of that matters much,what matters is the door tags GAWR for front and reat axles,do not exceed the GAWR ,and you will be fine....
Same with the GM 6.0 trucks,so many options,and configs,but in the end all that matters is you are under the GAWR on all axles on the truck,the truck has rims,and tires rated to carry the max GAWR,and the same is true on the trailer...then you want your registered weight to be high enough to cover the highest weight the axles will see,but no higher than the combined total of the axles.
Max tow ratings are manufacturers recommedations,they are not enforceable by DOT,only for warranty purposes.....one of my dads good freinds has been towing a 53ft 3 car gooseneck with Dodge trucks since 1995.He runs each truck 300,000-350K miles or so,and gets a new one,that is about 3 years for him.His first 2 trucks were 3500 DRW Cummins dodges with 11,000 GVWR,and a factory 16,000 GCWR! They were autos with 3.55 gears. He tows every single day of the week,up to 25,000lbs behind these trucks,with a total weight of 36,000 combined,runs thru every scale ,and is DOT compliant.All of his trucks have given him perfect service,he hasnt had any issues,and is fully legal at over 2x the recommended GCWR.The 99 he had lost a trans about a week before he was to get his new truck,he had 320,000 some miles on it....thats about it for anything big happening.....he runs 65mph down I95 with these rigs....