This is what the Lunati site shows for that cam. He showed the advertised duration:
"Solid Roller Cam. Excellent cam for street/strip applications. Has good mid range and excellent upper RPM, torque and HP. Works well in 346-360 c.i. motors. Needs 3200-3500 RPM stall converter or 4 speed transmission, headers, 10.5:1+ compression ratio or better and 4.10 gearing. Rough idle; Advertised Duration (Int/Exh): 279/285; Duration @ .050 (Int/Exh): 249/255; Gross Valve Lift (Int/Exh): .585/.600; LSA/ICL: 110/106; Valve Lash (Int/Exh): 016/016; RPM Range: 3000-7000;"
