If your seeing a good flow in the rat eye ate her on cold start up, it is prolly because da thermostat is MIA, or plum stuck open.
Prolly been that way for 40-50 years, but it is nice to have it come up to operating temp as it helps to evaporate the condensation in the crankcase that builds up. Especially now a days as most people are not working these old horses full gallop on a picker of plowing.
Did yer H have shutters? that helps to heat them up.
also I'd recommend a 180* stat as the 160's really don't get them warm enough to do much good.
Also you cannot use the usual car/truck thermostat it needs to be for a Farmall, as they are taller.
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