Single Groove Alternator Pulley: --Fits SBC 283-400 --Designed for most GM, Delco and Ford alternators --High quality chrome aluminum finish --The diameter of the pulley is 2.80" --Features a billet nose cone to cover the shaft and nut --Aluminum single groove alternator pulley --This will work on both LONG AND SHORT water pumps Alternator Pulley Fan: Chrome Aluminum Alternator Pulley Fan Package: Including all items shown in the picture. Note: Professional Installation is Highly Recommended.
