I dunno about 100 amp, but you can get an 85 amp at Autozone. Ask for the alternator to fit an 80 Chevy HD 1ton dually with the 454. You'll have to swap out the serpentine pulley with your V Belt unit, but that's it.
fourdoorjeep said:
Were can you find the high output (100 amp?) alternator for an 81 CJ with the 4.2L?