A question about the 195 thermostat...what effect does swapping aluminum components for the iron ones have on the pooling or wetting in the intake? In my engine's case the intake, water pump and housing, and heads are aluminum. I understand the 6 pack intakes were initially cast iron and later aluminum. What effect does the outside ambient temperature have on this (considering a range of climates from South Florida to all parts North) Just curious. Thanks.