Switch question for rear defroster

Capture rear defrost.JPG
Syleng1 said
The 66’ a body for the Barracuda may have been 2 speed. But the resistor is not mounted on the blower motor like the 67-76 model. Because they are so rare - very few people actually have that info.
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I have a NOS defroster kit. I wonder what it has? I also have later model parts without a switch and harness that does have the resistor.