The egg-crate grille has a long and storied history, used on some of the finest cars ever, and has been adopted and adapted in endless variation. Some are bit more authentic than others, and I suppose that truck’s grille is a variation on its theme too. But the other two examples here are a bit more compelling, by a long shot; the ’67 Checker we’ve already done, but I’m glad to see its quite elderly original owners are still out driving it. And the other one is for you to guess.
And before I forget, let me acknowledge TEXN3 as the winner of the Astro Clue.