On Ebay >>> http://www.ebay.com/itm/Model-T-Ford-Model-Ford-Heater-Cut-Off-And-Manifold-/180 772450457?pt=Vintage_Car_Truck_Parts_Accessories&vxp=mtr&hash=item2a16e0b099
Something must be missing~~~~~~~
It is hard to see from the photo, but I think this is the part that mounts in the dash board and allows hot air to enter the cab from a manifold heater. You would also need a special exhaust manifold and a manifold heater, which is a special box that fits over the special manifold. The air in the box is heated by the manifold and enters the cab through the part that is listed on eBay.
The part looks like it has a valve and deflector built in. The valve is so that you can shut it off in the summer.
I had one on my Model A. They don't work all that well, at least it didn't work well for my topless roadster.
Thanks Neil.......that's what I thought.
I can't imagine anything that would work in an open car but I've been driving da Coop in teens temps and some extra heat wouldn't hurt....... ;)