I'm looking at buying a baja bug and the only thing keeping me back from buying one is the heater. I live in norther wisconsin so the winter's long and cold. I just want to know what would be the best way to heat it during winter, even if it doesn't heat it very well on those below zero days. I just need to make it in like 20 degree weather. What should I do?
Get an RV heater or an Infrared propane heater. Unless your VW has had a lot of very expensive parts replaced, go propane. I have owned many air cooled VW's in Canada, learn from my mistakes.
Propane is no more dangerous than gasoline, but I would install a regular gas heater. They make them specially for VW, but also for RVs. They run on gasoline, have 2 fans, a spark plug, heat exchanger, etc., just like a little furnace. The link lists them for $250. (It says 6 volt, but they must also have a 12 volt model, or a resister could be used in series.) But I also got through a cold Wisconsin winter with an air cooled VW, by wraping the exhaust with copper tubing filed with coolant, that was pumped by a small electric pump, to a salvage heater core. VWs came standard with gas heaters in the 71 - 74 type IV, and the 79 - 83 type II. You can find them in salvage yards cheap.
