Yes, they are still out there NUMBER 2

[Vic Piano]

Bruce, the forward hole in the heat exchanger should be piped up to the radiator. There is a shroud that hangs from the two upper radiator hoses that collects fresh air and sends it to the heat exchanger. The blower motor should be connected to the rear hole in the heat exchanger, forcing fresh heated air into the car. That way there is no danger (in a good system) of getting any noxious fumes into the passenger compartment.