Chevrolet Big Block Adv. Duration: 299/305 Duration @ .050": 264/270 Lift: .561/.580 Lobe Separation: 112 LC Included Lifters: 91118 Direct Lube Flat Tappet 3600-7200. Increased mid-range torque & horsepower. Can be used with NOS.
Chevrolet Big Block Adv. Duration: 299/305 Duration @ .050": 264/270 Lift: .561/.580 Lobe Separation: 112 LC Included Lifters: 91115 Mechanical Flat Tappet 3600-7200. Increased mid-range torque & horsepower. Can be used with NOS.
Chevrolet Big Block Adv. Duration: 289/295 Duration @ .050": 254/260 Lift: .623/.629 Lobe Separation: 108 LC Included Lifters: 91118 Direct Lube Mech. Flat Tappet 3200-7000. Rough idle, Bracket/Oval Track, great high torque, good mid-range power.
Chevrolet Big Block Adv. Duration: 283/289 Duration @ .050": 248/254 Lift: .578/.623 Lobe Separation: 108 LC Included Lifters: 91118 Direct Lube Mech. Flat Tappet 2600-6500. Lopey idle, Street High Performance/Strip. Best with 3200 stall, 10.5:1 CR & 800+ cfm.