22" radiator or larger?

Our /6 turbo project is a race-ONLY unit that will likely never see the street.

The car had a 170 in it with a little 22" radiator. Our thought is to simply replace that 46-year-old unit with an aluminum 22"er.

Would we be wise to go for a 26" unit?

How would we fit it into the narrow radiator support that's in the car, already? Cut a wider opening?

What say ye???