The fender wall should have adequate ventilation to prevent it from being a hotbox, or people wouldn't put intakes there. Although I may mount it where the stock intake/pcm was, there is plenty of open air there and away from the elements. I'm more concerned with stop&go traffic where I'm not seeing any sort of airflow anyway which is why I'd like to have fans running when the car is, cooling when not moving.
Wiring to the radiator fans seems like the best bet since if those are on the transmission is probably getting warm too and nothing to have to change over come winter.
