pulley does a alternator use

so the old 1 is missing? does the rest of pulleys have serpentine grooves? what motor is it? 305 v8?

I have a serpentine pulley on the alternator but the rest of the pulleys are single, v pulleys. Whomever did the work on this vehicle never changed out alternators never switched pulleys I guess, how big should the single v pulley be?

i dont think it's critical a standard size should work? you got the belt? or when you go buy belt look up alt and see what size it's showing?

I have a 305 in the vehicle and I have to replace the belt because the last person who worked on the vehicle put on a v-belt on a serpentine pulley. There are no serpentine belts on the vehicle

was it working? just look up alternator at parts store for pulley size or get 1 off similar yr junker for chev v8.