Hint #2:

There's a photo of the parade lap for the A-Main documenting this closing of an era in USAC National Sprint Car racing. (I'm pretty sure I'm incorrect in recalling it being taken by Jim Mahoney, but in fact a photo does exist. Possible Al C. was the capturer???).

In this particular view of ALL of the A-Main participant's parade lap, "One of these thang's ain't like the others".