What I have had to do when I worked up north and a customer ( in the middle of January) needed a wabasto installed I would t into the heater lines and put 2 ball valves in the lines one on the heater core line after the wabasto t so it would only circulate through the block and one ball valve on...
Running the Nokians on my dually really awesome tires and on the dually I don't think they are bad in deep snow, but it is always hooked to a 30ft trailer and there is no tire that is good in deep snow when doing that,,,
Crap I guess I am part of this,,, I dont want to be part of it ( getting old ) but also do want to be part of it because there are a bunch of great guys here!!