In my second gen Camaro I have two options. To use one big fan, I need to mount it in front of the radiator and switch rotation so it pushes though, or put two small fans on the back side to draw the air through the radiator. The water pump pulley is so close to the radiator, there is limited room for one big fan behind it. I settled for two small puller fans behind it. I'm using the electric choke as the switched 12 volt source.