Ford Small Block 221-302 1963-1995, 351W 1969-96 
Advertised Duration: 294/300
Duration @ .050": 241/247
Valve Lift w/1.60 Rockers: .581/.603
Lobe Separation Angle: 112
Intake Centerline: 108
Valve Lash: Hyd./Hyd.
2600-6600. Rough idle, hot street & bracket racing, 10.5:1-up CR advised.

Ford Small Block 221-302 1963-1995, 351W 1969-96
Advertised Duration: 300/300
Duration @ .050": 247/247
Valve Lift w/1.60 Rockers: .603/.603
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: Hyd./Hyd.
2600-6600. Rough idle, street/strip, good mid range performance, 3200+ stall, good intake.

Ford Small Block 221-302 1963-1995, 351W 1969-96
Advertised Duration: 300/304
Duration @ .050": 247/251
Valve Lift w/1.60 Rockers: .576/.576
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: Hyd./Hyd.
2800-6700. Hot street/brackets, requires aftermarket heads, 3500+ stall.

Ford Small Block 221-302 1963-1995, 351W 1969-96 
Advertised Duration: 304/310
Duration @ .050": 251/257
Valve Lift w/1.60 Rockers: .592/.592
Lobe Separation Angle: 112
Intake Centerline: 108
Valve Lash: Hyd./Hyd.
3000-7000. Upper mid range & top end power, needs 11.0:1+ CR.

Ford Small Block 221-302 1963-1995, 351W 1969-96 
Advertised Duration: 306/312
Duration @ .050": 253/259
Valve Lift w/1.60 Rockers: .640/.640
Lobe Separation Angle: 112
Intake Centerline: 108
Valve Lash: Hyd./Hyd.
3200-7200. Best with big cubic inch, needs 11.0:1+ CR, good heads.

Ford SB 221-302 1963-1995, 351W 1969-1993
Adv. Duration: 278/284
Duration @ .050": 225/231
Valve Lift: .533/544
Lobe Separation: 108
Included Lifters: No
2000-6200. Small Base Circle, Noticeable idle, street & mild performance usage. Crisp throttle.

Ford SB 221-302 1963-1995, 351W 1969-1996
Adv. Duration: 260/266
Duration @ .050": 207/213
Valve Lift: .480/496
Lobe Separation Angle: 112
Included Lifters: No
800-4200. Small Base – for use with OE style hydraulic roller lifters & spider. Great daily usage, smooth idle, great fuel economy.

Ford SB 221-302 1963-1995, 351W 1969-1996 
Adv. Duration: 266/272
Duration @ .050": 213/219
Lift: .517/.517
Lobe Separation: 110 LC
Included Lifters: No
1000-4800. Small Base Circle, Fair idle, good low & mid-range performance increase.

Ford SB 221-302 1963-1995, 351W 1969-1996
Adv. Duration: 266/272
Duration @ .050": 213/219
Lift: .517/.517
Lobe Separation: 112 LC
Included Lifters: No
1000-5000. Small Base Circle, Good idle, off-road & street performance. 9.0:1 CR advised.