Kurt, thanks, that's it. I installed this kit 2 years ago and it has worked perfectly.
http://www.pelicanparts.com/catalog/shopcart/911M/POR_911M_electr_pg2.htm#item5
http://www.pelicanparts.com/catalog/images/John1/vdo_oil_temp_kit.jpg
But note that you hve to change the sender too. I need to sway senders with my old motor.
BTW, anyone who doesn't have this, should definitely get one, especially taking your car to the track.