The 462 in my '67 doesn't get much higher than 185 even sitting in traffic in the middle of the summer here in AZ. Other than the aluminum radiator, everything else in the cooling system is factory. The shroud came with the car, but I don't believe it's correct. It fits OK, but night tightly against the radiator. I have 3" from the radiator to the parting line of the clutch, so about 2.5" to the face.
