You are correct to worry about overheating, the 6.0 has marginal cooling capacity.
I have a Warn bumper on my van, and it blocked enough air to cause overheating when climbing steep grades on hot days. Had to drill 11 x 2" holes in the bumper to cure the problem.
You cannot rely on the factory gauge to tell you the engine temp, that gauge doesn't move from the middle from about 160 to 235 degrees.
Mike
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Alaska to Key West, Labrador and more
Prostate cancer survivor. See Thread Prostate cancer and Sportsmobiles
2015 VW GTI 2020 Fiat 124 Spider
2012 E250 Hitop camper
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