Ford Big Block 429-460
Advertised Duration: 281/287
Duration @ .050": 249/255
Valve Lift w/1.73 Rockers: .649/.649
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: .022/.022
2800-6800. Choppy idle, street/strip, high torque with great mid-range, best with 3000+ stall.

Ford Big Block 429-460
Advertised Duration: 281/287
Duration @ .050": 249/255
Valve Lift w/1.73 Rockers: .649/.649
Lobe Separation Angle: 112
Intake Centerline: 108
Valve Lash: .022/.022
3000-6800. Good idle, broad mid-range power, small supercharger or NOS kit ok.

Ford Big Block 429-460
Advertised Duration: 285/291
Duration @ .050": 253/259
Valve Lift w/1.73 Rockers: .738/.738
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: .022/.022
3200-7000. Lopey idle, street/strip, good low to mid-range torque & power, 3500+ stall.

Ford Big Block 429-460
Advertised Duration: 289/299
Duration @ .050": 257/267
Valve Lift w/1.73 Rockers: .692/.692
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: .022/.022
3400-7200. Moderate idle, good in strong street or bracket car.

Ford Big Block 429-460
Advertised Duration: 289/299
Duration @ .050": 257/267
Valve Lift w/1.73 Rockers: .692/.692
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: .022/.022
3400-7400. Good in strong street or bracket car, ok w/NOS.

Ford Big Block 429-460
Advertised Duration: 293/297
Duration @ .050": 261/265
Valve Lift w/1.73 Rockers: .715/.715
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: .022/.022
3600-7600. Rough idle, bracket E.T. strong mid-range design. 12.0:1 CR 4000+ stall.

Ford Big Block 429-460
Advertised Duration: 299/305
Duration @ .050": 267/273
Valve Lift w/1.73 Rockers: .744/.744
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: .022/.022
3800-7800. Rough idle, bracket killer for big inch (500+), 12.5:1 CR 4000+ stall.

Ford Big Block 429-460
Advertised Duration: 299/305
Duration @ .050": 267/273
Valve Lift w/1.73 Rockers: .744/.744
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: .022/.022
3800-7600. Rough idle, good mid-range performance, 12.5:1 CR 4000+ stall.

Ford Big Block 429-460
Advertised Duration: 301/309
Duration @ .050": 269/277
Valve Lift w/1.73 Rockers: .715/.715
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: .022/.022
4000-7800. 460+ CID, 11.0:1 Comp, strong mid to upper range horsepower.

Ford Big Block 429-460
Advertised Duration: 305/311
Duration @ .050": 273/279
Valve Lift w/1.73 Rockers: .744/.739
Lobe Separation Angle: 108
Intake Centerline: 104
Valve Lash: .022/.022
4200-7800. 460+ CI, great mid-range & upper end, needs 5000+ stall, 12.5:1 CR.

Ford Big Block 429-460
Advertised Duration: 305/311
Duration @ .050": 273/279
Valve Lift w/1.73 Rockers: .744/.739
Lobe Separation Angle: 110
Intake Centerline: 106
Valve Lash: .022/.022
4200-8000. 460+ CI, great mid-range & top end, needs 5000+ stall.