Chevrolet Big Block
Adv. Duration: 295/303
Duration @ .050: 260/268
Lift: .629/.623
Lobe Separation: 108 LC
Included Lifters: 91118 Direct Lube Mech. Flat Tappet
3200-7000. Rough idle, good mid-range torque & power. Needs good heads & intake.

Chevrolet Big Block
Adv. Duration: 295/303
Duration @ .050: 260/268
Lift: .629/.623
Lobe Separation: 108 LC
Included Lifters: 91115 Mech. Flat Tappet
3200-7000. Rough idle, good mid-range torque & power. Needs good heads & intake.

Chevrolet Big Block
Adv. Duration: 303/313
Duration @ .050": 268/278
Lift: .623/.650
Lobe Separation: 108 LC
Included Lifters: 91118 Direct Lube Mech. Flat Tappet
4000-7600.  Moderate competition, excellent mid & upper rpm power. 12.0-1 CR.

Chevrolet Big Block
Adv. Duration: 303/313
Duration @ .050": 268/278
Lift: .623/.650
Lobe Separation: 108 LC
Included Lifters: 91115 Mechanical Flat Tappet
4000-7600.  Moderate competition, excellent mid & upper rpm power. 12.0-1 CR.

Chevrolet Big Block
Adv. Duration: 295/303
Duration @ .050": 260/268
Lift: .629/.623
Lobe Separation: 108 LC
Included Lifters: 91118 Direct Lube Mech. Flat Tappet
3600-7200.  Rough idle, good mid-range torque & power. Needs good heads & intake.

Chevrolet Big Block
Adv. Duration: 295/303
Duration @ .050": 260/268
Lift: .629/.623
Lobe Separation: 108 LC
Included Lifters: 91115 Mechanical Flat Tappet
3600-7200.  Rough idle, good mid-range torque & power. Needs good heads & intake.

Chevrolet Big Block
Adv. Duration: 285/291
Duration @ .050": 250/256
Lift: .595/.606
Lobe Separation: 110 LC
Included Lifters: 91118 Direct Lube Mech. Flat Tappet
2800-6600.  Increased mid-range torque & horsepower. Can be used with NOS.

Chevrolet Big Block
Adv. Duration: 285/291
Duration @ .050": 250/256
Lift: .595/.606
Lobe Separation: 110 LC
Included Lifters: 91115 Mechanical Flat Tappet
2800-6600.  Increased mid-range torque & horsepower. Can be used with NOS.

Chevrolet Big Block
Adv. Duration: 303/311
Duration @ .050": 268/276
Lift: .650/.670
Lobe Separation: 112 LC
Included Lifters: 91118 Direct Lube Mech. Flat Tappet
4000-7400.  Competition use, great mid & upper rpm horsepower. 12.5-1-up needed.

Chevrolet Big Block
Adv. Duration: 303/311
Duration @ .050": 268/276
Lift: .650/.670
Lobe Separation: 112 LC
Included Lifters: 91115 Mechanical Flat Tappet
4000-7400.  Competition use, great mid & upper rpm horsepower. 12.5-1-up needed.

Chevrolet Big Block
Adv. Duration: 285/295
Duration @ .050": 250/260
Lift: .595/.629
Lobe Separation: 112 LC
Included Lifters: 91118 Direct Lube Mech. Flat Tappet
3000-6800.  Fair idle, excellent Bracket cam. Increased CR required.

Chevrolet Big Block
Adv. Duration: 285/295
Duration @ .050": 250/260
Lift: .595/.629
Lobe Separation: 112 LC
Included Lifters: 91115 Mechanical Flat Tappet
3000-6800.  Fair idle, excellent Bracket cam. Increased CR required.