Cam and lifter kit for Big Block Chevy engines; CL-Kit includes cam, lifters, assembly lube, instructions and decals; Hydraulic - Xtreme Energy: Good for street machines, slightly rough idle, stock converter will work but best with 1800+ stall.; 268/280 Advertised Duration, 224/230 Duration .050", .515"/.520" Lift, 110 Lobe Separation; Valve spring upgrade required
