radiator transmission lines help

I have used Classic Tube for my fuel and brake lines. High quality stuff. Go stainless if you want it to stay looking good. When (if) you go to connect the lines to the radiator cooler connections, check whether they are pipe thread or inverted flare. Champion radiators for one are inverted flare..... Jamming a pipe thread fitting into an inverted flare port will ruin the aluminum threads.