Located at the base of the thermostat housing. Possibly has red on it.
Not sure. I was thinking it was a fan switch. I have an '88 motor but it's a turbo and this one isn't on it. I thought someone might have one available from a bum motor of something.This is for the AC over-temp cut-off? If I'm not mistaken you can get those on rock-auto but they are a bit pricey.