Which Carb kit do I need

Hi. I have 73 Dart 225 slant 6 with a 1920 carb in it. The other numbers are 6594 1313 and 3698347. I'm trying to find the correct carb rebuild kit and float for it. The Walker site lists two carb kits for the 73 Dart 225 slant 6. 15519A and 15480A. I didn't see a float listed. Can anyone help in identifying the correct carb kit and float.

Thanks for any help.

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