I just know ive been racking my brains trying to figure out which radiator to get. I have the 440 in my dart with the original 318 radiator which has a 17x22 inch core size and need a little better cooling. I want to make the right decision on which one so i dont have to return it so need something that will indeed fit in there. Im wondering if one of the 26 inch core aluminums will bolt right in place of the factory 22 inch..I have 29" between the inner fenders..