During those years pressurized alcohol was King. It is likely that your boat never had a propane system on board. As you probably know Propane is heavier than air, flows like water, pools at low spots and is explosive in large concentrations. Propane tanks are installed in a sealed locker, vented at is low spot to the outside of the hull. Look for such a locker but if none is found it is likely that the boat never was equipped for propane. It could have been equipped for natural gas and tanks were usually located inside the cabin as CNG is lighter than air and will dissipate rather quickly but the popularity of the fuel in portable tanks fell into disuse by the general population and it is currently in the last stages of being phased out for small boat use. Being the fact that the cost of a proper propane installation nowadays may run into a couple of thousand dollars many are returning to denatured alcohol. Origo makes non-pressurized stoves which perform rather well and run on denatured alcohol which can be obtained by the gallon at any hardware store. These might be your standard choices as many have developed alternative systems hanging propane tanks from the stern rails, adapters to stealth fill CNG tanks at motor vehicle stations or running camping stoves. For those live aboard with access to shore power an electric stove is a plausible consideration. Nice looking boat but I personally would refrain from a propane system upgrade unless I were to become a full time cruiser.
