Anyone know the location of the coolant temp switch on a 81 6'er?? I've read that it's on the thermostat housing but I am not seeing a 2 prong switch there. Maybe I got the wrong part??

Are you taking about the 2 prong switch that turns on the Aux fan? I am doing it tonight on a 79 euro and it is on the passenger side bottom of the radiator.

Thanks!! I think I found my answer though. Depending on what you have, I'm assuming that's it's either going to be No. 6 or 7 in the picture below.

http://www.realoem.com/bmw/diagrams/b/d/0.png

RealOEM doesn't allow linking to their site, so the illustration didn't load.

You have to use BMWfans. They list the code to link to the illustration right at the top of it.