Also need to consider that the radiator is only part of the cooling system. IMO the heat exchanger dissipates more heat, especially at lower speeds than the radiator. The 78 Invader had the smallest heat exchanger, 79 and up were longer. The LTD and Ceptors had a much larger exchanger and location moved to the back of the tunnel where the snow hits it more. The 78 lives up to the "hottest thing on snow".