Features: 1. Application: This alternator bracket will use a 43″ V-belt, which fits for Small Chevy 305 327 350 5.0L 5.7L V8 Eight Cylinder Long Water Pump Carburetor. Replace your old stamped steel factory alternator bracket with this alternator bracket. This bracket uses a slotted tension design to maintain a tight belt. 2. Superior Material: Made of high quality solid steel and billet aluminum with anodizing for great strength and durability, precise machining ensures perfect fitment and long term reliable service. 3. Product Feature: Designed for V-belt systems only, using Chevy alternators with 6.56 inch, center to center bolt holes.(12si style alternators) .