At 06:55 AM 7/7/2002 -0700, you wrote: >Funny, my '67 idles fine when cold but barely idles >when hot. My working theory is the carb is getting >hot, and the gasoline is evaporating out of the float >bowls. Usually, vapor lock occurs only when you turn off your car. It sounds like a super severe case Mike. Try to add a thin plastic spacer between your carb and the manifold. This should act as an insulator. If no improvement, your problem is somewhere else. How about that heat riser valve? D^2