to OP, 1st get a scan gauge and then watch the deltas on the water and oil temps. Several sites such as FTE and the powerstroke.org will have much information for you. Powerstroke I think has better stickies to read. But until you can actually monitor the engine well it will be hard to see what may be needed. I have an 04 6.0, and we just got back from atrip to northern Az with it with no issues. As a matter of fact I have had more issues with the V10 then we ever did with the 6.0!
Dont know anything about your location but there are some references to places in miami I think, look up diesel power magazine also diesel world they have featured several trucks from down in that area.