hocbj23
+1y
since ur carb base is heated in the winter by warm water from the radiator,if u live in a cold climaTE the truck might not get warm enough to allow the thermo to open with a 195 thermo.if u live in a warm place it wont make any difference.The 2 stage allows some warm water to flow at a fairly low temp to keep things from freezing up and allows u to get some heat from the heater early on.bj