Iron goin' Right

He's still using his brake . . . must be a Class C racer?  Nice goggles.  Must be after 1964?  A Mustang and a Chevelle in the background.  You see a lot of "white pants" at 1960s motorcycle races being worn by more than just the flagman.  I wonder what those white pants actually were?  I need to get a set of White Dickies so I fit in at Davenport.