The first and only one we have used here in the champion brand was the 3 core unit we bought and put in my son's 68 fury 3. You're absolutely right they are damn nice radiators. Of course my son's car took on a tree at 40 and it's no longer around. (The radiator. The car is in our gravel lot, next to our shop.) Lol. Guess who wont be driving the duster.