High Energy, 268H Good Replacement, Noticeable idleHYDRAULIC: Good replacement for stock performance grinds in 390-428. Noticeable idle.SpecificationsRPM Range: 1500 to 5500Valve Timing: 0.006Lobe Separation: 110°Intake Centerline: 106°Vehicle Fitments: Year Make Model Submodel 1963 Ford...