The A/C crank (belt) pulley I have for my '68 383 Road Runner has four (4) belt grooves but my car doesn't have power steering, is this pulley correct?

Would anyone have a belt and tensioner layout for a '68 383 rr engine with A/C and no power steering. My altenator has a two (2) groove pulley and I thought the crank pulley should only have three (3) grooves (one for the water pump/fan and two for the A/C-Alt), is there a pulley for no power steering or is it just not used when you don't have pwr-str?????? Do I need to find a different A/C pulley TIA.

MikeR