1965 273 4 groove crank pulley questions

I need a 4 groove crank pulley to reinstall the PS and AC on my 1965 Dart. I've been searching for this elusive pulley for many months now, does anyone know if this is unique to 1965? I have seen many photos of setups with only 3 grooves. This is what it should look like:

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I have this one, is there a number I can check, or do you need measurements to see if it's the right one?

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