Magnum 294S Mechanical Flat Tappet CamshaftLift: .595''/.595"Duration: 294�/294�Lobe Separation Angle: 110�RPM Range: 2500-6500 *Note: In order to use these camshafts in 1965-66 396/427ci blocks, it is necessary to machine a 3/16'' wide x 7/64'' deep groove in the rear main journal of the cam to allow oil flow to the top of the engine.Good for Street/Strip cars. 3000+ stall Converter or 4-speed. 10:1 compression, headers and low gears. Very rough idle.Operating Range:2500-6500 RPMDuration Advertised:294° Intake / 294° ExhaustDuration @ .050'' Lift:248° Intake / 248° ExhaustValve Lift.