Chevrolet Small Block 305-350
Advertised Duration: 260/266
Duration @ .050": 207/213
Valve Lift w/1.50 Rockers: .450/.465
Lobe Separation Angle: 112
Intake Centerline: 108
Valve Lash: Hyd./Hyd.
800-4200. Great daily usage, smooth idle, great fuel economy.

Chevrolet Small Block 305-350
Advertised Duration: 262/268
Duration @ .050": 209/215
Valve Lift w/1.50 Rockers: .465/.470
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: Hyd./Hyd.
1000-4400. Improved throttle response & low end torque.

Chevrolet Small Block 305-350
Advertised Duration: 266/270
Duration @ .050": 213/217
Valve Lift w/1.50 Rockers: .485/.495
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: Hyd./Hyd.
1000-4800. Fair idle, good low & mid range performance increase.

Chevrolet Small Block 305-350
Advertised Duration: 266/270
Duration @ .050": 213/217
Valve Lift w/1.50 Rockers: .485/.495
Lobe Separation Angle: 112
Intake Centerline: 108
Valve Lash: Hyd./Hyd.
1000-5000. Good idle, off-road & street performance, 9.0:1 CR advised.

Chevrolet Small Block 305-350
Advertised Duration: 266/270
Duration @ .050": 213/217
Valve Lift w/1.50 Rockers: .485/.495
Lobe Separation Angle: 114
Intake Centerline: 110
Valve Lash: Hyd./Hyd.
1000-5000. Good idle, broad power range with strong mid-range performance.

Chevrolet Small Block 305-350
Advertised Duration: 270/278
Duration @ .050": 217/225
Valve Lift w/1.50 Rockers: .495/.500
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: Hyd./Hyd.
1200-5400. Noticeable idle, broad low to mid range power band, needs 2000+ stall.

Chevrolet Small Block 305-350
Advertised Duration: 270/278
Duration @ .050": 217/225
Valve Lift w/1.50 Rockers: .495/.500
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: Hyd./Hyd.
1300-5500. Good idle, street performance, strong low mid range, stock converter OK.

Chevrolet Small Block 305-350
Advertised Duration: 272/278
Duration @ .050": 219/225
Valve Lift w/1.50 Rockers: .525/.525
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: Hyd./Hyd.
1500-5600. Fair idle, performance street, nice street-able mid-range power, 1800+ stall suggested.

Chevrolet Small Block 305-350 with OE Roller Block
Advertised Duration: 272/278
Duration @ .050": 219/225
Valve Lift w/1.50 Rockers: .525/.525
Lobe Separation Angle: 112
Intake Centerline: 108
Valve Lash: Hyd./Hyd.
1500-5600. Fair idle, good all around performance, good vacuum, computer compatible with chip.

Chevrolet Small Block 305-350
Advertised Duration: 278/278
Duration @ .050": 225/225
Valve Lift w/1.50 Rockers: .525/.525
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: Hyd./Hyd.
2000-5800. Mild choppy idle, strong torque curve, likes good intake & exhaust, 2500+ stall.

Chevrolet Small Block 305-350
Advertised Duration: 278/278
Duration @ .050": 225/225
Valve Lift w/1.50 Rockers: .525/.525
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: Hyd./Hyd.
2000-5800. Fair idle, street high performance, 2200+ stall, aftermarket intake, header.

Chevrolet Small Block 305-350
Advertised Duration: 278/284
Duration @ .050": 225/231
Valve Lift w/1.50 Rockers: .500/.510
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: Hyd./Hyd.
1600-5400. Fair idle, street/strip, auto ok with 2500+ stall.