Chev Gen III/IV (LS Series) 3-Bolt '97-Present Adv. Duration: 285/292 Duration @ .050": 216/220 Lift: .559/.560 Lobe Separation: 114 LC 1500-6000, good all around power in a 5.3-5.7L.
Chev Gen III/IV (LS Series) 3-Bolt '97-Present Adv. Duration: 286/282 Duration @ .050": 220/224 Lift: .575/.575 Lobe Separation: 112 LC 1600-6500, mid-range and top end power and torque.