Chevrolet L6 292 1963-1990
Adv. Duration: 259/267
Duration @ .050": 205/213
Lift: .490/.501

Lobe Separation: 112 LC
Includes Lifters: Yes, 91111-12
1200-4200.  Street Force™ 1, Good idle, Mild Street performance, strong low end torque.

Chevrolet L6 292 1963-1990
Adv. Duration: 275/275
Duration @ .050": 221/221
Lift: .519/.519

Lobe Separation: 108 LC
Includes Lifters: Yes, 91111-12
1600-4500.  Nice idle, good low & mid range horsepower. Requires stall converter.

Chevrolet L6 292 1963-1990
Adv. Duration: 277/285
Duration @ .050": 223/231
Lift: .525/.548

Lobe Separation: 108 LC
Includes Lifters: Yes, 91111-12
2000-5000.  Fair idle, Hot Street Performance. Strong mid range. 2500+ stall.

Chevrolet L6 292 1963-1990
Adv. Duration: 291/295
Duration @ .050": 237/241
Lift: .525/.548

Lobe Separation: 110 LC
Includes Lifters: Yes, 91111-12
2500-5500.  Lopey idle, good mid-range power. Needs 3200+ stall.

Chevrolet L6 292 1963-1990
Adv. Duration: 267/267
Duration @ .050": 213/213
Lift: .502/.502

Lobe Separation: 110 LC
Includes Lifters: Yes, 91111-12
1200-4200.  Good idle, Street, Off-Road, Towing. Good fuel efficiency.