[Fbks_Cruiser]

From Madelectrical website:

Model 12SI, output 94 amp, 9:00 clock position, ACDelco part number 321-269

This is what I used. Got it from Rock Auto for about $90 if I recall. 12:00 is NLA but you can rotate it.

Also from MAD:
12SI, 94 amp, at 3:00 (AC-DELCO # 321-266, Lester #7294-3)

Tell the auto parts counter person that “The alternator is for a 1984 High performance Chevy Camaro, with 5.0L (305G) engine, 94amp alternator

12SI, 94 amp, at 9:00 (AC-DELCO # 321-269, Lester #7294-9)

Tell the auto parts counter person that “The alternator is for a 1985 Buick Riviera, 5.0L (307Y engine), with Heavy Duty options and Air Conditioning.”

12SI, 94 amp, at 12:00 (AC-DELCO #none found, Lester #7294-12)

No AC DELCO part number or application was found for this output model at 12:00 position.