yep, what they said! Trinary switch is a must. As for 195-205 temps, that's nothing to worry about. Since at least the 90's engines have been designed to run about 210 all the time. Older engines can do it too, but I've been told by the older generation hot rodders that it's ideal to be between 185-200 for normal operating temps on older engines. I don't worry about the temps until they creep up above 225.