Nope, that's the heat stove. The idea there was that it warmed up the air cleaner and carburetor for improved cold running. The Thermal Air Cleaner switch uses a bimetallic diaphragm that opens once warm and simply drops a door over the inlet port once it's warmed up. The Manifold heater is an electric heater below the carburetor that helps the intake manifold warm up when cold, otherwise you run a risk of fuel droplets forming on the walls of the manifold. I ended up just rebuilding the whole thing. There's a how-to over at the Eagles Den forum.
