Chevrolet BBAdv. Duration: 294/306Duration @ .050": 250/256Lift: .588/.593
Lobe Separation: 110 LCIncludes Lifters: No2800-7000. Pro street/bracket, needs good intake, 3200+ stall.
Chevrolet BBAdv. Duration: 287/2896Duration @ .050": 240/246Lift: .574/.578
Lobe Separation: 110 LCIncludes Lifters: No2300-6500. Street/strip, rough idle, 2800+ stall, 9.5:1+.
Chevrolet BBAdv. Duration: 274/286Duration @ .050": 230/236Lift: .552/.555
Lobe Separation: 110 LCIncludes Lifters: No1800-6000. Strong mid-range, 2200+ stall.
Chevrolet BBAdv. Duration: 268/280Duration @ .050": 224/230Lift: .515/.520
Lobe Separation: 110 LCIncludes Lifters: No1600-5800. Slight rough idle, stock converter ok, best with 1800+ stall.