I'm not real well versed in carburated vehicles at all, but I believe its not horribly uncommon to see carbs heated by exhaust or coolant to aid in fuel vaporization. You just have to make sure that you don't get the fuel too hot in the fuel line so it vaporizes in the line causing vapor lock. If I recall correctly, the smaller hydrocarbon chains can vaporize at temperatures lower than the coolant temperatures.
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