What is this AC box for?

I got this a few years ago from someone that originally obtained from an estate, it came with a bunch of other items for '66 Valiant & Barracudas.
But it does not look like its for a '66 A-body.
It has part number 3502 102 on it if that helps.







Then the next questions are who needs it & how much might it be worth?
I could probably get it to the Mopar Nationals at Columbus.