High Energy, 268H Street Performance, Noticeable IdleHYDRAULIC: Good low-end and mid-range torque. Street performance, noticeable idle.SpecificationsRPM Range: 1500 to 5500Valve Timing: 0.006Lobe Separation: 110°Intake Centerline: 106°Vehicle Fitments: Year Make Model Submodel 1980 Buick Century...