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Howards Cams Hydraulic Flat Tappet Camshaft
All Howards Cams camshafts use the highest-grade quality cores available. Computer designed with knowledge of over 65 years of performance and racing camshaft manufacturing. Howards Cams camshafts are manufactured on dedicated high precision cam grinding machines. Rockwell checked and Parkerized to ensure the highest quality control standards available anywhere. Packaged and shipped in a unique hard, high impact plastic reusable case. This ensures that the high quality camshaft that went into the case comes out in the same condition, when delivered, as when it was packed.
Manufactured on Dedicated High Precision Machines
Held to Strict Tolerances
High grade quality cores
Rockwell Tested & Parkerized Ensuring the Highest Quality
Hard protective packaging
Part Type: Camshaft
Application: Chevrolet Big Block V8 Mark IV 396-402-427-454, '65-'96
Ignition Firing Order: OE (1-8-4-3-6-5-7-2)
Cam Style: Hydraulic Flat Tappet
Basic RPM Range: 2800-7000
Manufacturers Description: Fair idle, Hot Street/Strip, big mid-range torque. 10.0:1+ CR, 3000+ stall.
Intake Duration @ .050": 245
Exhaust Duration @ .050": 249
Advertised Intake Duration (@ .006"): 299
Advertised Exhaust Duration (@ .006"): 303
Intake Valve Lift with OE Rocker Ratio (1.70): .578"
Exhaust Valve Lift with OE Rocker Ratio (1.70): .578"
Intake Lobe Lift: .340"
Exhaust Lobe Lift: .340"
Intake Valve Lift with 1.72 Rocker Ratio: .585"
Intake Valve Lift with 1.75 Rocker Ratio: .595"
Intake Valve Lift with 1.80 Rocker Ratio: .612"
Exhaust Valve Lift with 1.72 Rocker Ratio: .585"
Exhaust Valve Lift with 1.75 Rocker Ratio: .595"
Exhaust Valve Lift with 1.80 Rocker Ratio: .612"
Lobe Separation Angle: 112 Degrees
Intake Centerline: 108 Degrees
Small Base Circle: No
Cam Gear Attachment: 3-Bolt
Valve Adjustment: Zero Lash Plus 1/2 Turn
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: 120741-12
Weight: 10.0 lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Each
Note: Stock (O.E) valve springs cannot be used.
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