Radiators : 1968 to 1977 or 1978 to 1980

[Dudleyfj40]

I see on Mosley's web site they offer two different Rads. The cut off date is early to 77 and 78 and up.
Mosley say's that the 78 is a larger radiator.
Question, has anyone put a 78 radiator in an earlier FJ55 or Visa Versa? Did Mr. T go bigger for better cooling?
Having cooling issues, All the radiator shops around me has closed. Looking to just get new.