Alternator Replacement What Amp ?

[Blues Pwr]

I need to replace the Alternator in my 1986 442 9 code 307 with all pwr, windows, seats, door locks, antenna, rear window defroster and astro moon roof.
I replaced it back in 2001 and I think it was either 100-105 amp.
All the local parts stores (Advance & Auto Zone) say 78-94 amps I just don't want something that will be undersized.
Thanks for any info provided.

[88hurstolds]

78 amp 12SI is the factory amp for VIN9.

[Blues Pwr]

Thanks for the info, really appreciate it.