Ca someone identify this heater box?

I was recently given this heater box and told it was from a 1969 charger, but after looking online, can see it does not look like one of those can some here figure out what it goes to?

Not a 66-70 b-body of any kind. Not an ebody non A/C.

looks like a truck r van heater box, I would find a part number somewhere on it and google it, should tell you what you want to know. I promis you that is NOT a 69 b-body box, lol...

Could it be an a/c-body heater box? All he even has in Mopar stuff, kinda weird if he had som thing diffrent.

Guess nobody had an idea of what it was. Any clues to figuring it out?

Looks C-body to me.

Is it a heater box (I don't see a heater core or hose connections in it) or is it part of the duct work system? Looks like a floor vent/heat distribution duct. With the vacuum operated door closers, I'd put it in the late 60s/mid-late 70s C or the full size B body. Gene

Its not an A body box that I've ever seen. The way it mounts to the firewall makes me think its a GM box if it has no Chrysler part #'s.