Pontiac V8 265-455 1955-1981 Adv. Duration: 289/294 Duration @ .050": 235/241 Valve Lift: .488/.503 Lobe Separation Angle: 108 Intake Centerline: 104
Included Lifters: 91411 Hyd. Flat Tappet 2700-6500. Rough idle, street/strip. Needs 9.0:1+ CR, 2500+ stall, good intake, gears & headers. |