Cam and lifter kit for Big Block Ford engines; CL-Kit includes cam, lifters, assembly lube, instructions and decals; Hydraulic - Xtreme Marine: Strong mid-range with good throttle response, great for small blower, noticeable idle.; 270/286 Advertised Duration, 226/236 Duration .050", .554"/.557" Lift, 112 Lobe Separation; Valve spring upgrade required