64 Dart GT Slant 6 Electric Fan Conversion

On my '64 Valiant, I use a single 10" pusher fan in front of the condenser - there is very little room between the water pump pulley and the aluminum radiator (and not all that much between the condenser and the grill!). Any fan on the engine side of the radiator will have to be offset, or really, really skinny.

I used this schematic as a base: Ted's Simplified Electric Fan wiring schematic text - Slant Six Forum, and added in parallel to the thermostatic switch a trinary switch to run the fan when the AC is running, and an overriding "drive-through" switch to make it run when I want it to. It works well.