Thanks Joe and Alan for your comments. After I posted my question I got to thinking about it and figured I had it wrong in my mind. The hottest part of the radiator would be the top and that's where the fan should be mounted. Alan, I have been to your website many times and read all about your electric fan installation and the need for relays. I tried for 8 hours (yes, 8 hours)yesterday to call Mark at M.A.D. Electrical. I finally got through at 5:45 PM PST and talked to him about my needs. I ordered 2 relay kits for the fan and at the same time the alternator kit. Mark is very helpful and a nice person to talk to, but he sure is hard to get a hold of. Thanks again, Don