Best way to add heat to a Subaru conversion? Options

[CptTripps]

I would like to add heat and defrost to my Subaru conversion, but I'm not sure the best way to do it. Now, I'm no expert on the ventalation system of these cars, but I was hoping to have something simple like 2 discrete motors. One for the vents on the dash, and another for the defrost.

The stock heat blowers are intact on the car, but I don't believe they're hooked up at all, since the PO had a SB350 installed. That motor is going bye-bye, and I'm not sure the best way to add something to replace it. I don't need fire shooting out of the vents like my Land Rover, just enough to get the windscreen clear and take the edge off of a cool night.

I see a few aftermarket blowers that I can put in-line with the heat tubes, but how should I GET the heat? Is thee a way to do it from the water in the radiator?

[gryphon68]

Considering this myself.

This is where I'm leaning. Please feel free to shoot holes in my theory.

Using a expansion tank with radiator cap as the highest point in my coolant system. With the addition of a couple more inlets and outlets or some fitting tee's you can have a small electric pump circulate water through the heater core branch and return it to the tank.

Heater core and heater core branch lines need to be kept lower than the top of this tank.

Ideally this would probably be mounted on the rear wall of the front trunk.

You could either run one leg of the engine-to-radiator coolant lines through the tank, or what would probably be cleaner would be a large tee in one of the engine-to-radiator coolant lines running to the expansion tank.

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