Chevrolet Small Block 262-400 Cam Series: 4/7 Swap Advertised Duration: 309/317 Duration @ .050": 277/285 Valve Lift w/1.50 Rockers: .675/.645 Lobe Separation Angle: 106 Intake Centerline: 102 Valve Lash: .022/.022 5200-8800. All out competition big cylinder head & compression.
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