It is possible to get LPG in your Air cooled car. The only issue with LPG is the damper. Watercooled cars use the water flow to prevent the daper from getting frosty.

In the old day's they used a special tube around the exhaust. This is not allowed any more so they switched to something that takes the heat from the oil.

an url:

http://www.geocities.com/vwtyp181/lpg.htm

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