A real quick one (maybe!). Apart from the obvious difference, why are there two temperatures of thermostat listed (74° and 82°) for the Series III? I need a new one and my local parts supplier has the 82° one on the shelf. The one that came out is a 74° one ('75 SWB 2.25 diesel). Is there a special reason for the different temperatures, or are they essentially interchageable?
Thanks Steve