Ford Small Block 221-302 1963-1995, 351W
Advertised Duration: 285/291
Duration @ .050": 253/259
Valve Lift w/1.60 Rockers: .683/.683
Lobe Separation Angle: 106
Intake Centerline: 102
Valve Lash: .022/.022
2800-6600. Good mid-range horsepower, rough idle, needs 11.0:1 CR-up.

Howards Cams Max Certified Hydraulic Flat Tappet Camshaft & Direct Lube Lifter Sets
Ford Small Block 351W 1969-1996
Lift: .501/.501
Duration @ .050: 231/231
Lobe Separation Angle: 108 LS
  5-Year No Fault Warranty
  Held to Strict Tolerances
  High grade quality cores
  Includes Matching Performance Hydraulic Lifters
  Includes 4 oz. Bottle of Max ZPM Break-In Additive

Ford Cleveland/M 351C-351M-400
Advertised Duration: 269/269
Duration @ .050": 215/215
Valve Lift w/1.73 Rockers: .513/.513
Lobe Separation Angle: 110
Intake Centerline: 105
Valve Lash: Hyd./Hyd.
1800-5200. Strong low & mild range, fuel efficiency & driveability.