The crank shaft pulley I have for this car I'm building has space for two belts in it. This car is non a/c and has a manual steering box so it will only have the one belt running the alternator. I'm thinking that the lower pulley should only have one groove but can't seem to find any part info on that. Is it possible that all cars used the same 2 groove lower pulley regardless of options? Thanks in Advance !