Could someone knowledgeable tell me what the heck this is
The inside frame I bought from eBay where it was advertised as "35/36 Coupe Sedan". Now that I've worked all weekend on it to separate the halves (yes, it took me all weekend!) and clean it, I took out for comparison the original frame that came on the car. Not with it but on it. My car's a 36 coupe and that frame fits perfect. It's just very rusty on the inside.
The coupe's frame is the bigger one on the outside.
What is the smaller one? Evidently not "35/36 Coupe". I don't know if it could be a sedan frame but then it was falsely advertised.