My dad has a 99 F-350 Superduty 7.3L turbo diesel. He has a dual axle Haulmark 7 foot wide trailer loaded with all of his plumbing equipment (including industrial pipe threaders, lots of tools, tons of hardware, etc)... basically it's his workshop on wheels. If i had to guess, the trailer weighs close to 13,000 lbs.
We upgraded his turbo to a larger 66mm ball bearing unit, installed 5" exhaust, installed a water injection kit, and installed a bullydog tuning system.
Stock, the truck struggled tremendously to pull the trailer. Now, he can literally pull anything.
If i had to guess, the truck has around 700ftlb torque at 30psi... stock is around 400ftlb. Also gets 15mpg pulling all that weight....
