will i get enough out of my alternator

i just orderd a 200 amp alternator for my 1992 chevy K1500 4.3L. will i get the voltage through that stock wire or will have ot upgrade my wire to i think 4 gauge. will it owrk

Well I would imagine that your stock setup would be okay but I would upgrade because in my opinion as far as wire goes bigger is almost always better! plus less likely that you'll have any problems.