Tiny,
99 dodge = 24v cummins. From 1998.5-2002 Dodge used a 24v cummins. The 24v were known for lift pump and injector pump problems. Also, in 1999 you would have had a 47re tranny, the 47re is about like the old e4od in the fords. Not made for work in a heavy applications. They just don't hold up well. With regard to the injectors... something sounds fishy, I am betting that the failure was more related to a bad vp44 replacement pump than the actual injectors.
They were pulling a 3 horse, no living quarters, and I was pulling a 4 horse with a 16 foot shortwall.
The 2011 Ford puts out something like 390 Hp and 735 tq. The third gen dodge puts out ~325 hp and 600tq. That's like saying your v8 mustang just smoked your buddies v6 camaro.
You may have had a heavier load, but when you are at highway speeds you are both battling air resistance, which is the real load. Put a 20k load of pipe on a trailer and you can flat roll on the interstate. Now drag a 5k extra tall cargo trailer with a slab sided front, and I doubt you'll be able to maintain speed as easily as the 20k load.
