cool things with wheels, since 2006
If you can get a closer look the date will be in the top corner of the plate - https://en.wikipedia.org/wiki/Vehicle_registration_plates_of_Iowa - maybe 1958? Looks too early to be 1967.
looks like 58 to me, and I didn't see that before.. compliments to you, your eyesight is better than mine!
another reader confirms, 1958! Ah ha! You got it!
I had another look at the wiki page and realised I had not scrolled down far enough in the first look. There is a list of the county codes which tells us that 85 is the county of Story, which is not too far from Des Moines. Maybe that is where the drag strip is where the pic was shot? There must be a reader from the area who could confirm that.