When you mount a Chevy alternator to a Holden engine its close but not quite right. Aeroflow have developed a spacer kit to get the fitment and belt alignment perfect. This adapter kit allows the use of Aeroflow Chev 100-, 120- and 140-AMP alternators to be mounted to any Holden V8 and even the Holden 6 Cylinder, fitted with a Bosch alternator.