Additionally this kit comes with. Upper Water Pump & Crankshaft pulley Kit. This water pump pulley has a 6.6" Diameter and 1.75" Mounting bolt Circle.
These Single Groove pulleys are designed for your Small Block Chevy 283 - 350 with a Short Water Pump. Constructed of thick gauge aluminum and with a high quality Satin Aluminum finish, this kit would be great addition to your project. This listing also includes brand new water pump bolts for your aluminum pulleys. These aluminum bolts measure 5/16-24 x 3/4.