Alternator

Anyone here using a 1 or 3-wire GM 100 amp alternator with their 4 cyl?? Was wondering what i was gonna need to mount one?

is the stock isuzu alternator 1-wire or 3-wire?? i see that the plug is 3 pronged on the stock alternator but on the wiring diagram in the manual i only really see where one wire goes.

Im going to try and add a second alternator to mine and leave the factory on for the truck. The second for stereo.