Chevrolet Small Block 262-400 Advertised Duration: 297/307 Duration @ .050": 243/253 Valve Lift w/1.50 Rockers: .508/.530 Lobe Separation Angle: 108 Intake Centerline: 104 Valve Lash: Hyd./Hyd. 2600-6600. Small Base Circle, performance/competition, works well with samll blower or NOS. |