22 or 26 inch radiator

In my 62 /6 car, I put in a 28" high efficiency radiator out of a big block Cordoba, used the stock 22 mount on one side, drilled two holes for the mount on the other side, and opened the opening to 28" and added the Cordoba shroud.
Done.

Edit: forgot to mention, I put in a 500hp 440 too.