Doug I think what Gary was getting at is that brass radiators actualy use copper pipes for the heat exchanger tubes and aluminum uses aluminum tubes. Aluminum is lighter but copper does do better in heat transfer. Given the same air flow through the engine compartment an aluminum engine will give off more heat. But as far as Blaines question, no one here can answer that until Blaine trys out his new engine himself. Blaine you are not running hotter because you have turbos, you are running hotter because you are running over two and a half times the horsepower that the Pantera was designed to handle. You are getting eight hundred plus horsepower because you are burning one hell of a lot of gasoline in a very short time frame in a relatively small space. No one can answer for sure what kind of overheating problems you might encounter until you just crank her up and pound on that puppy.