BB Chevrolet

300 Advertised Duration 244 Duration @.050 108 Lobe Center Lift Base on Rocker Ratio 1.7  = .552 Gross Lift 1.8 = .585 Gross Lift     Computer-Controlled Compatible: No Valve Springs Required:Yes Always Check Valve...

Advertised Duration .274 Advertised Duration @ .050  .224 Lobe Center : 112 Valve Lift with Factory Rocker Arm Ratio 1.7 =  .485 Intake & Exhaust  14" of vacuum Computer-Controlled Compatible: No  Valve Springs...

Advertised Duration .274 Advertised Duration @ .050  .224 Lobe Center : 110 Valve Lift with Factory Rocker Arm Ratio 1.7 =  .485 Intake & Exhaust  14" of vacuum Computer-Controlled Compatible: No  Valve Springs...

  Big Block Chevrolet Part # 02-012 Hydraulic Camshaft Grind # H-274-8-B Advertised Numbers Numbers @.050 Intake Duration 274 274 Exhaust Duration 274 274 Lobe...

290 Advertised Duration 236 Duration @.050 108 Lobe Center Lift Base on Rocker Ratio 1.7  =  .535 Gross Lift     Low vacuum, canister or pump recommended  Computer-Controlled Compatible: No Valve Springs...

280 Advertised Duration 238 Duration @.050 108 Lobe Center Lift Base on Rocker Ratio 1.7  = .485 Gross Lift   Low vacuum, canister or pump recommended  Always Check Valve to Piston Clearance  Always Install New Lifters...

280 Advertised Duration 231 Duration @.050 108 Lobe Center Lift Base on Rocker Ratio 1.7  = .535 Gross Lift   Computer-Controlled Compatible: No Valve Springs Required:Yes Low vacuum, canister or pump...