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You will find throughout that the alternator is 110 amp. And then on page 47 you will find the notation for a 140 amp with snowplow option.
Apparently your 2002 has a 130 amp, doesn't matter if you have the SP prep. At some later time, Ford starting downgrading the standard alt to 110, and offering a 140 upgrade, but only for the diesel.
thanks for the input....thats weird because if i type in my vin on the ford parts website my only option was 110 AMPS.......my mechanic buddy said there has always been a problem with ford only putting in 95 amp alternators.......and no markings on mine at all....