26" radiator in my 1974 360 dart sport, this came with the car. Should i be running a good 22" radiator?

L code on dash vin plate means it's a 360.
Measure the radiator opening between the grille and the radiator.
Measurement should be close to 26 inches.
How many fan blades do you have?
Has a flex fan with no shroud, who makes the a quality radiator to install?