old catalytic converter

I have an old (20 yrs) catalytic converter. Still in the original shipping container. The only markings it has show that it was from AC spark plug division of GM, and on the converter a paper sticker with:
JK 25056151 537 543

I'm looking for a way to find out what vehicle it fits so that I might find a better use for it than recycling.

82 Camaro, you're welcome.

Many thanks.

Did a search online (Google rocks) and it matches up with a 1982 Chevy Camaro V8. Now you can hock it on eBay. Good luck!