I have a 160 in my 261 powered '51 one-ton. It has not been above freezing for well over a month here. On a recent short trip (15 mi.) with the temperature about 10F, the temperature gauge says about 140 and the heater is anemic even with cardboard covering about 2/3 of the radiator. I hope the new 180 will cure that but it's too cold to change it. Supposed to warm in a few days.
