easy to work on. If you have to rely on a shop to do all your maintenance be sure they know the 6.0 and be prepared to spend.[/QUOTE]
Almost spit my coffee out on that easy to work on bit
Since you already have it , the coolant filter is good advice. If it were mine it would get an upgradeds EGR cooler at the least.
The single best thing you can do is DO NOT work it hard with big "trailer" load unless engine is up to operating temp to help head gaskets live.