Same alternator after hand polishing and redone brackets.
Truck has 160amp 12V Delco alternator. I took the whole alternator down to pieces and checked all the parts before hand polishing the core. From inside alternator was like brand new, so only part I needed to change to new was front bearing cause it had minor unwanted noise in it.
Not only the core was handpolished, but also the fanplate went trough the polishing. Alternator brackets were redone also as well as the cables too to get nice show quality look overal.