Chevrolet L6 194-230-250 1962-1984
Adv. Duration: 257/263
Duration @ .050": 203/209
Lift: .438/.484

Lobe Separation: 112 LC
Includes Lifters: Yes, 91111-12
1000-4000. Street Force™ 1, Good idle, Mild Street Performance, strong low end torque.

Chevrolet L6 194-230-250 1962-1984
Adv. Duration: 261/261
Duration @ .050": 207/207
Lift: .490/.490

Lobe Separation: 109 LC
Includes Lifters: Yes, 91111-12
1000-4000.  Smooth idle, strong low end. Good vacuum, good fuel economy.

Chevrolet L6 194-230-250 1962-1984
Adv. Duration: 267/267
Duration @ .050": 213/213
Lift: .502/.502

Lobe Separation: 110 LC
Includes Lifters: Yes, 91111-12
1500-4400.  Good idle, Street, Off-Road, Towing, Good fuel efficiency.

Chevrolet L6 194-230-250 1962-1984
Adv. Duration: 275/275
Duration @ .050": 221/221
Lift: .519/.519

Lobe Separation: 108 LC
Includes Lifters: Yes, 91111-12
2000-4800.  Nice idle, good low & mid range horsepower. Requires stall converter.

Chevrolet L6 194-230-250 1962-1984
Adv. Duration: 277/285
Duration @ .050": 223/231
Lift: .525/.548

Lobe Separation: 108 LC
Includes Lifters: Yes, 91111-12
2500-5400.  Fair idle, Hot Street Performance. Strong mid range. 2500+ stall.