Warspeed V2 Driver Side Alternator Only Bracket Kit WS-AOK | Designed and manufactured by Warspeed Industries in Australia. This bracket mounts your alternator on the driver side of your engine (iron block only, aluminum blocks without threaded hole will need to drill and tap). This kit includes bracket, spacers, and unique offset tensioner. | Included are both F-Body (Long), and Corvette (Short) spacing spacers. | Belt Recommendations: 7.480 diameter balancer: 6pk850-860 / 10% under: 6pk825 / 25% under: 6pk775. | This is not designed to work with a mechanical water pump. | No more stretch fit; No more throwing belts; Still use factory back support; Hi speed tensioner; Quality fasteners; Made in Australia; LS1 offset and L98/LS3 offset; Easy simple installation; No bending flexing or twisting.