Small Block Chevy Water, Crank, Alternator Pulleys & Fan Set. 3 Pulley and Fan Set. 283 - 305 - 307 - 327 - 350 - 400. Single groove water pump pulley. Both crank and water pump are 6-5/8 diameter.Alternator pulley is 2-7/8 diameter. I will try to help and resolve all issues that may occur. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Accessory Belts\Pulleys". The seller is "keyrodandkustom" and is located in this country: US. This item can be shipped to United States.