My '66 Barracuda driver floor board area will get very wet if I leave her out in the rain. Its about a 10" by 6" area just a few inches from the edge of the driver seat. Any ideas where to start and trace the entry point or clog? I don't make it a habit to leave her outside but once in a while when I get her worked on its left outside. Its been a problem for a longtime but I never addressed it since she is garage kept and driven on nice dry days.