Got a Grand National fan for my 455. Looking for some fellas who may have the same set up and could give advice regarding a good controller set up. I am putting out a conservative 475HP/535TQ for a driver. Anybody got any suggestions for a thermostat & controller combo? I'm thinking I would like a manual switch to turn the fans on manually but I would also like them to be temperature activated as well. Open to all advice and set ups someone may already have success with. Thanks a lot. MN