EFI Retro-Fit Hydraulic Roller Cam - Chevrolet Big Block 297/307

Retro-Fit Hydraulic Roller. Maximum high performance street and mid level strip cam. Needs aftermarket computer and fuel injection modifica- tions, 3000-3500 RPM stall converter, headers, 10:1 compression ratio and 4.10 gearing. Rough idle.; Advertised Duration (Int/Exh): 297/307; Duration @ .050 (Int/Exh): 238/248; Gross Valve Lift (Int/Exh): .640/.629; LSA/ICL: 114/112; Valve Lash (Int/Exh): Hyd/Hyd; RPM Range: 3000-6800; Includes: Cam Only