Electric Fan Q&As

I just put a set on my 318. I originally had the setup in my 71 Corvette, but the slanted radiator they use was causing me some issues with airflow at speed I think. The set is a Summit generic set, http://www.summitracing.com/parts/SUM-G4852/. I was even lucky enough that they literally slid into place. They pressure fit between the upper and lower radiator end caps so I don't even need bolts to hold them in. The engine setup is not original and the radiator looks pretty dang thick for a little 318 (probably 2" thick), but the fans work pretty good. When both are one it will bring the temps down nice and low. For now I just have a toggle switch that flips a relay to turn them both on, but I'm putting a temp switch in now that I know they will cool. I bought a thermostat housing spacer that has two 3/8 threaded ports that I was going to put a switch in one.