May be on to something with the Corvette application. Did a little research and it seems like it was a late 54' application? Also makes sense due to clearance issues on the vette. I bet the pictured set-up below especially if it was limited application run is a fairly rare item.
https://www.flickr.com/photos/advance-design_parts_co/14258907690/in/set-72157631868452754
The decal may indicate it was sourced from existing parts bins for the Corvette as they took parts from all kinds of stuff for the early ones. It may have been used in another application finding out exactly which one is the puzzle piece.