The #3 cylinder baffle, as supplied from the factory, has a big round hole cut in it. You're supposed to attach a hose flange here and connect a scat hose to pick up air for the cabin heat… problem is, that only works for a vertical induction engine, and mine has horizontal induction. So I had to fabricate a cover plate to make the hole go away.
I put a bead of RTV between the baffle and the cover plate to keep air from leaking past. I'll have to wait till I buy the heat muff to figure exactly where I'm going to relocate the heater air supply.
