What radiator for 64 360 barracuda?

64conv65hard said

My 64 Barracuda radiator opening is only 19" and has a 273 motor. I know the 65 has a larger opening.

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I have been out of town. My memory was that the radiator opening in my 65 Barracuda was 19 inches, but I got back home today and measured it. It's 22 inches.
Just FYI, the opening in my 63 Valiant is 19 inches.