Not certain, but very often, it is necessary to be a member of a forum in order to post photos (and sometimes, even to post hyperlinks). You (and your husband) have a tool that fits into this section of Tool Talk - and there's even a suitable thread to start from! - so, why not sign in? We hardly ever bite: this is probably the best-behaved forum I've ever been on, anywhere, in fact. And we LOVE pictures. You can even tell us a little bit about yourself / yourselves on the Welcome Board, if you'd like.
Another possibility would be to place copies on one of the photo-sharing services, and provide a link to that place.
I don't recognize the Barnsdale Rd. address, but most of their nameplates just listed either Cicero or LaGrange Park. Some early ads listed numbers on S. 52nd, but that was long before the connection with Thor. Likely, official headquarters got changed several times, especially during the time around the purchase of Speedway.