Kerwin, is it an aftermarket A/C system that was common in the 50s-60s? Lots of dealers installed them in their shops, as well as repair shops and garages. Does it have a brand name on it? Do you know what it came out of? What do you plan to use it in?
Once I saw an eBay truck, 54 Chevy if I remember correctly, that had an underdash A/C system on it. Maybe someone posted a picture of it on Stovebolt... years ago. Sorry, not necessarily germane to this discussion.
