Clutch fan options on my 340?

Do NOT get a non-thermal clutch fan.

Get the thermal one (with the spring on the front). They are the bees knees. First start up from cold you can hear them for ten seconds, then they kick in and the fan speed drops and they're quiet. I bought a Hayden one from Rock Auto.

The non-thermal ones quietly roar all the time, and that means you're using fuel and hp.