WA WTB 61 AMP alternator with date code

[72BBChuck]

Looking for a 61 AMP alternator. I understand these were used on all GM vehicles with AC? I need it for a restoration so the date code would need to fall somewhere in the 90 days prior to November 20th, 1971. The part # is 1102455. See the example in the attached photo. The date code is 1 J17 for the which translates to October 17, 1971. I would prefer one in the range 1J1 to 1K20 but could work with one a little earlier if that is all I can come up with. Thanks, Chuck