BudW water pump pulleys

There were 2 water pumps for the F body SB. A 6 vane and an 8 vane. The 6 is for AC cars. I have seen a couple places that F body SB AC cars also had a smaller water pump pulley. Does anyone know or BudW can you check your parts books and see if there is different part numbers for water pump pulley AC vs non AC?

Thanks!