Ford Straight 6 140-250 1963-1983 (7.808” Deck)
Advertised Duration: 259/269

Duration @ .050": 205/215

Valve Lift w/1.50 Rockers: .420/.455

Lobe Separation Angle: 112

Intake Centerline: 108

600-4500. Street Force™ 1, Good idle, mild street performance, strong low end torque.

Ford Straight 6 140-250 1963-1983 (7.808” Deck)
Advertised Duration: 263/263

Duration @ .050": 209/209

Valve Lift w/1.50 Rockers: .420/.420

Lobe Separation Angle: 108

Intake Centerline: 104
1200-4800. Good idle, street, off-road, towing. Good torque.

Ford Straight 6 140-250 1963-1983 (7.808” Deck)

Advertised Duration: 267/267

Duration @ .050": 213/213

Valve Lift w/1.50 Rockers: .450/.450

Lobe Separation Angle: 110

Intake Centerline: 106

1600-5000. Strong low & mid-range torque & horsepower.

Ford Straight 6 140-250 1963-1983 (7.808” Deck)
Advertised Duration: 275/275

Duration @ .050": 221/221

Valve Lift w/1.50 Rockers: .470/.470

Lobe Separation Angle: 110

Intake Centerline: 106
1600-5000. Nice idle, good low & mid-range horsepower. Needs good exhaust.