Transmission cooler location and ???

I will be using a 727 behind my BB in my Scamp. My radiator does not have a trans. cooler and I will be using a remote cooler. If I put it in front of the radiator, will it reduce the radiator cooling too much? If I locate it out of the way of the flow of air through the radiator will I need an accessory fan? Do the units with an integrated fan come with an integrated temp switch/relay or do we need to install one some where. I first saw about remote location on AndyF's Duster Project. What are the locations that are preferred? Any make and model recommended??