440 in a body radiator

oldmopardude - you are actually wrong in stating that all A-Bodies had 22" openings. From 73 & up, if the car had N51 (max cooling) it got a 26" radiator/opening. This was commonly seen on cars that were equipped with performance engines and/or air conditioning. So, even if is 74 has a /6 it is still possible for it to have a 26" radiator from the factory.