A few $10 coolant water filters can prevent the problems that the 6L and 6.4L engines had on them. I put a coolant filter on my 1997 Ford Bounder motorhome with a 460" gas engine in it, and it has had no engine problems whatsoever!
I only changed the rotor and spark plug wires on it at around 15 years old, 50,000 miles. Still running the original spark plugs, coil, heater hoses. I did change the radiator to engine 2" diameter hoses at 10 years old, along with it's only coolant change. And I changed both fan belts somewhere outside Yellowstone NP, where one broke in 2006. Not bad for a 18 year old motorhome that is always at 20,000 GCVW.
I installed Napa coolant filter #FIL 4070 and kit to install it is FIL 4019. My truck driving buddy highly recommends the coolant filters to me, because they stop minerals from wandering around in the cooling system, clogging the radiator, allowing minerals and dirt to build up on radiator heat exchanger, and keeps wear on the water pump minimal. Hoses and seals also benefit from the coolant filter and the SCA's that come precharged in some of the water filters.
Glad that you are having a great time with your truck too!
Have fun camping!
Fred.