I'm curious to see what you guys think this might be worth. It's the original heater box. Just pulled that and the core out yesterday! From my understanding, these were stock in cars up in the northern US and I got mine here in Michigan so it would make sense!
I would estimate it to be worth almost $0. Most valuable part is that copper/brass heater core (if it isn't rotten). Can't seem to find those aftermarket right now and the aluminum ones they make are garbage.
This part of the above statement is way off. You can easily get over $100 for this setup without the heater core on eBay.
Aaron is right about the heater core though. It’s worth it to repair / recore an original vs using an aftermarket POS.
I've seen them made out of both metal and a composite. My car has no ac and the box is metal. It's pretty close to the headers, I couldn't imagine the plastic/composite ones doing well 2 inches from headers. My old Edelbrock TES headers were almost touching and I clearanced it. Dons headers have more room there but not a ton.
FWIW,the AC boxes are composite and the top piece is plastic and they've seemed to have lasted fine, but aftermarket are hit and miss sometimes. The ones ive seen on ebay say plastic, but some look like they could be metal.