I want to convert my 67 GTX to power steering. I have to get a two groove crank pulley and have a question. I would like to know if the crank pulleys on 67 440's are any different than later years (different part number)? I think I have a forged crank two groove pulley in my collection of parts but it is likely from a later model year car. Also, will I have to use a different water pump pulley when changing to a two groove crank pulley?