Jimmy, glad to hear it went well.
Two questions: First, where was the temp needle on flat ground with the 160 compared to the 195? Should have been slightly lower and second, when the temp dropped on the grade, was the fan roaring? because if it was, there is nothing wrong with your cooling system. If you were on a steep grade, with the fan clutch engaged(roaring)and it brought the temp down, that is exactly how it is supposed to work and you have the "capacity to support a 160" as I mentioned in an earlier post.
RR