Old topic but still about air cooled engines.

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Have you thought of contacting Edd China ? He's an expert in air-cooled VW engines

I would say it was perfectly possible as long as the car wasn't used in slow moving traffic. The large (energy sapping) fan on the air cooled VW's helps keep the engine cool in traffic but a car without such a fan would quickly overheat. However I would think that thermostatically controlled fans attached to the oil radiators would probably work.

Years ago I had the pleasure of seeing an air cooled 911 engined Beetle which had an oil radiator piped to the front of the car. However that car still had the fan attached to the engine and the oil cooler was just in the airflow.

No 'fan' in Bess. Never has been. Well apart from me that is.

I think he is referring to the lack of a heater and interior fan, rather than engine cooling.

My Beetle was always cold in winter and too hot in Summer as the warm air always seeped past the flaps.

The problem with using an oil cooler for cab heating will be that in winter, when you need it, the cooler will keep the oil too cool for the engine.  Most oil coolers are connected through a thermostat to avoid this, so your heater will only work if the thermostat is open.

Actually I meant the engine, there is something called a fan, shrouded at the back and pulley driven but honestly, it is not exactly efficient.

From looking around the internet I am not confident that there will be enough of an input to create a heating effect and am back at the electric heater route. Webasto have one which will need a sight more power than the current electrical system in Bess can provide but looking at the general dimensions it MIGHT do the job. Still looking into it which at least is entertaining. It is either that or some form of home made, oil filled heating system that I might be able to put in front of the gear leaver and under the consul with an altered air box/plumbing (Windscreen).

Something that reduces misting problems is sealing the holes in the bodywork and ensuring door and window seals are in good nick. I bought new door seals recently due to the guys who did the metal and paint restoration cutting the old ones off rather than remove them properly. Standard septic seals come in at £64 but I went for the pukka German seals at £150 each due to their quality and the German seals having a lifetime guarantee, unless some idiot cuts them up that is.