Hopefully, most of you know about the publication, "Those Wonderful Unauthorized Accessories For The Model A Ford" by Murray Fahnstock and printed by Post Books.
This a reproduction of a hot ram air heater that resembles some shown on Pages 125 - 141. There are two flex tubes that go into cast aluminum adjustable air registers in the floor of car.
Each time I muse through this paperback, I get inspiration to cobble up similar gadgets to those in the book.