Ford Small Block 221-302 1963-1995, 351W 1969-96 Advertised Duration: 301/309Duration @ .050": 269/277Valve Lift w/1.60 Rockers: .693/.661Lobe Separation Angle: 106Intake Centerline: 102Valve Lash: .022/.0224400-8400. Rough idle, competition, great upper rpm torque, 12.0:1+ CR, 4500+ stall.
Ford Small Block 221-302 1963-1995, 351W 1969-96Advertised Duration: 301/309Duration @ .050": 269/277Valve Lift w/1.60 Rockers: .693/.661Lobe Separation Angle: 108Intake Centerline: 104Valve Lash: .022/.0224400-8600. Competition, good upper rpm torque & horsepower, 12.0:1+ CR & race converter.
Ford Small Block 221-302 1963-1995, 351W 1969-96 Advertised Duration: 301/309Duration @ .050": 269/277Valve Lift w/1.60 Rockers: .720/.693Lobe Separation Angle: 106Intake Centerline: 102Valve Lash: .022/.0224400-8400. Competition, good upper mid to top end torque, 12.0:1+ CR & race converter.
Ford Small Block 221-302 1963-1995, 351W 1969-96 Advertised Duration: 301/309Duration @ .050": 269/277Valve Lift w/1.60 Rockers: .720/.693Lobe Separation Angle: 108Intake Centerline: 104Valve Lash: .022/.0224400-8600. Super pro/bracket, good upper rpm torque & horsepower, 12.0:1+ CR & race converter.
Ford Small Block 221-302 1963-1995, 351W 1969-96Advertised Duration: 301/309Duration @ .050": 269/277Valve Lift w/1.60 Rockers: .720/.693Lobe Separation Angle: 110Intake Centerline: 106Valve Lash: .022/.0224500-8800. Good mid-range power with top end pull, 12.0:1+ CR race converter.
Ford Small Block 221-302 1963-1995, 351W 1969-96Advertised Duration: 307/315Duration @ .050": 275/283Valve Lift w/1.60 Rockers: .688/.672Lobe Separation Angle: 108Intake Centerline: 104Valve Lash: .022/.0224800-8600. Strong upper horsepower, 11.5:1+ good heads.
Ford Small Block 221-302 1963-1995, 351W 1969-96 Advertised Duration: 307/315Duration @ .050": 275/283Valve Lift w/1.60 Rockers: .688/.672Lobe Separation Angle: 110Intake Centerline: 106Valve Lash: .022/.0224800-8600. Competition profile, good top end power, needs god parts.
Ford Small Block 221-302 1963-1995, 351WAdvertised Duration: 285/291Duration @ .050": 253/259Valve Lift w/1.60 Rockers: .683/.683Lobe Separation Angle: 106Intake Centerline: 102Valve Lash: .022/.0222800-6600. Good mid-range horsepower, rough idle, needs 11.0:1 CR-up.
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