Was wondering if anyone could tell me for my 74 Caprice with the 400 motor if the belts {Fan, A/C alternator, PS, Air pump } would have the smooth belt or the ribbed belts on the pulley's. I currently have the original two belts for the PS & A/C and they are smooth. The alternator has been replaced {carquest brand} and that is ribbed. I have been looking at A/C Delco stuff and they are all ribbed. Want to keep it right for judging so any help is appreciated.