For a dealer installed radiator, I would think it only fair to focus on what was available from Ford, and exclude any third party equipment. In 1968 there were only three radiators available for 65/66 Mustangs, and they would all have been equipped with the built-in automatic transmission cooler. The picture is from the general text section of the MPC. I looked at the accessories section and see only a radiator bug screen, no radiator. I also checked the performance section, and there are hi-performance water pumps but no radiators.