I'm looking for a copy of the ad that was popular back in the '50s or '60s where you could buy a kit to convert your Chevrolet by putting Cadillac Tail Lights Or Tail Ends on them. Kind of like the one pictured here that was recently found in Canada.
There are a couple of ads pictured in this article. https://www.customcarchronicle.com/custom-history/customizing-with-early-cadillac-tail-fins/