Cam and lifter kit for Big Block Chevy engines; CL-Kit includes cam, lifters, assembly lube, instructions and decals; Hydraulic - Thumpr: High performance street, stock converter ok, best with 2000+ converter and gears. Choppy/thumping idle.; 279/296 Advertised Duration, 227/241 Duration .050", .498"/.483" Lift, 107 Lobe Separation; Valve spring upgrade required
