If you want a fan controller please select either Maradyne OR Dakota Digital. You do not need both. Also if you are running a LS you can run the fans off the computer. It is customer preference whether or not you still want the fan controller.
If running a LS we will also need to confirm that the hose connections are on the passenger side. Once you place the order, we will call you to get the above information as well as the exact year of the vehicle, the engine, horsepower and chassis.