I was sent these photos from a fellow who wants to know what he's got. If you look close, you can see a Chevrolet bowtie on this item in the top picture. He didn't include any dimensions.

What he has there is a draft deflector for the super-rare 1930 Chevrolet genuine accessory one-piece exhaust jacket heater. It bolts to the floor in front of the seat on the driver's side, and there is a shut off lever that comes up through the slot in the flange of the draft deflector to shut the accessory exhaust jacket hot air heater on and off. The entire heater consists of this piece, a shut off valve and lever assembly, the one-piece exhaust jacket that takes the place of the exhaust pipe between the manifold and the muffler, the funnel assembly that mounts on the cylinder head behind the radiator, a few brackets, and the flex tube that connects the funnel to the one-piece exhaust jacket.

Mmmmm....wow....!

Thanks Dog! I've passed your info onto the owner.

Cool! Glad that I was able to help.