Cold Case 26in Rad fitment

I don’t understand the lack of clearance for the Hayden 2947. Is there a difference between the design of the 22 and 26 radiators? How they fit in the car? Or is it a function of the year of the car? My cold case 22 radiator and Hayden 2947 fit well in my 69 barracuda. I probably have 3/4 inch clearance from the radiator to the fan. I am running a 360 with the aluminum (70 & up) water pump and 7 blade fan.