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Indy Cylinder Head's 500-inch crate motor is normally spec'd with a pump-premium-friendly 10:1 compression ratio. In this blower application, a more appropriate 8.25:1 Wiseco piston is specified. The solid Comp Cams grind features a wide 112-degree lobe separation angle (LSA). An excellent Holley 950-cfm HP vacuum secondary carburetor was the fuel mixer of choice.