Ford Small Block 351W 1969-1996 Adv. Duration: 277/277 Duration @ .050": 230/230 Lift: .563/.563 Lobe Separation: 108 LC Included Lifters: 91211 Hyd. Flat Tappet 2800-7000. Fair idle, broad power band. Works well in heavy vehicles.
Ford Small Block 351W 1969-1996 Adv. Duration: 285/285 Duration @ .050": 231/231 Lift: .501/.501 Lobe Separation: 108 LC Included Lifters: 91211 Hyd. Flat Tappet 2600-6800. Broad power range , extra performance in smaller engine.
Ford Small Block 351W 1969-1996 Adv. Duration: 282/291 Duration @ .050": 234/244 Lift: .572/.596 Lobe Separation: 108 LC Included Lifters: 91211 Hyd. Flat Tappet 3000-7000. Rough idle, Hot Street/Strip, big mid range torque and acceleration.