[Jerry Clayton]

pretty March under drive pulleys only work in March---by April its too warm out----

Seriously, underdrive pulleys are for high rpm systems to slow down alternator and waterpump speeds OR to save Horsepower on a short run like possibly drag strip

You have listed about every NO NO that is possible ----underdrive pulleys , small 16 non shrouded fan, non shrouded radiator, but does have a Kirkham expansion tank