I am not sure what your asking. If the wiring is still there it will still work. Only thing missing is the speed resistor and the relay that was in/on the old air box. Plug it back in and find a place to put it.
I had to make that part on mine so I got wiring diagrams down in my shop. We can get it going again. Biggest issue is do you want a off position. 69 and up were on all the time and 3 higher speeds. But by eliminating one wire it is off and 3 speeds.
A under hood picture of what you got would help see what is needed/missing now.
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