I think I have some of those loops buried away somewhere. There were two kinds as I recall: straight and 90°.
Here in Manitoba, we did not have heaters in most of the old dueces and 3/4 tons. We did have frost shields on the front windows so that we would not break our SIN cards trying to keep the windshields clear. Occasionally, when it got really cold, we would open the little floor opening that you could check he transmission level on the dueces and let some of the heat in.
That was back in my militia days mind you. When I left the regular force, my MRT had a second heater (from an Iltis) plumbed into the cab that was controlled by a thermostat on the dash. The factory heater was just to try and keep the windshields clear. My truck also had bucket seats, and in the cargo bed, amongst the vidmars and storage bins, was a 24 to 12 volt converter for the VCR and TV, a 30,000 BTU hunter heater for normal heating, and an M115 heater for those really cold nights, as well as to heat up the poptarts for breakfasts or the pizzas for supper.. There were many other niceties as well, so yes, I do understand about field modifications.
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