Bear in mind, due to the closeness to the USA border, several racers from Washington and Oregon frequently made appearances. As an aside, near the end a gal can be seen behind the wheel of her '69 GTO. Her name is Sylvia Braddock and she later became a force in racing her wheel standing Dodge A100 with twin Hemi's in the back. I know her personally and she is still a great humored person living in Greater Vancouver.
Bill