That's not a big problem since I have a CO detector for my plane that can function when on the ground as well. NOw just procure a paropane sensor and I'm home free.
I have the same furnace and found the recall has to do with the hose used between the heat chamber and the fan. It is a short piece of heavy duty 2 1/2" or 3" about 1 1/4 long. I think TOMW has a good pic on his 1967 overlander site that shows the recall stove and the good one. Check the orfice on the propane supply and blow out with compressed air only. DO NOT SHOVE A NEEDLE IN THE HOLE OR IT IS CAPUT.
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