What does the correct thermostat housing, thermostat, and water pump for a 261 look like and how is it plumbed so that it doesn't overheat on initial startup when the typical thermostat is completely closed? I understand it is critical to always have some coolant flowing and have heard of a dual function thermostat. I would like to see the correct parts and learn how the entire system works. Mine has the typical hoses to the radiator and the loop to the heater, but there is another plugged hole under the top hose to the heater.
