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i don,t know,factory built race car with a heater?
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Clear to me you have never driven one. If you ever get the chance to drive one on the strip through a set of headers and slicks you will see very quickly why the heater was left in .You will need it to dry your underware.

I hate fords but respect these probally because it was the only car I have ever driven that scared me.And not just once.