We lived very close the the "Green Valley" drag strip when I was a kid. My uncle was a sports car racer and in the mid 60's they turned the drag strip and the return roads into a road course. I remember one race and there was a car that was lapping everything on the track. I asked my uncle what kind of car it was and he said home made with an outboard boat engine in it. This car was screaming down the track. It was surprising what would be turned into a race car back then.