My friend C, who owns a pickup truck, was kind enough to go with me today to pick up the engine block. On the way, we passed by Sears Point/Infineon Raceway. It was then that he revealed to me that back in the good ol' days, he participated in motorcycle sidecar racing. I thought it was just for chips-eating Belgians, but apparently, a few Americans were into it as well.
C piloted a modified BMW at Sears Point, Laguna Seca, Ontario Motors Speedway, and once up in Portland. Here are some vintage photos C shared: