David Snyder did a print titled Auto Show 1970. I have it, but it's still in the tube. I looked it up online, and I believe the car you speak of has the tail light section barely visible. I'm sure he had some photos available to help with what to include in his print. You could try reaching out to him.
My favorite was the 1971 Chicago Auto show, would love more pictures of that. Especially the Tor Red Roadrunner in the middle.