Crane Cams 680931 Mechanical Flat Tappet Camshaft – Chrysler Big Block 383–440 – 3-Bolt

Upgrade the performance of your Mopar big block with the Crane Cams 680931 Mechanical Flat Tappet Camshaft. Designed for Chrysler, Dodge, and Plymouth 383–440 B-Series and RB-Series V8 engines with a 3-bolt timing gear, this high-performance camshaft delivers excellent mid-range torque and strong top-end horsepower for street/strip and bracket racing applications.

Featuring 284°/294° advertised duration and .540″/.560″ valve lift, the 680931 (Grind F-248/3600-2-8) is intended for engines with increased compression, upgraded valvetrain components, and a manual transmission or high-stall automatic converter.

Vehicle Compatibility

Fits Chrysler B/RB Big Block V8 engines, including:

• Chrysler 383 V8
• Chrysler 400 V8
• Chrysler 413 V8
• Chrysler 426 Wedge V8
• Chrysler 440 V8

Suitable for many Dodge, Plymouth and Chrysler muscle car applications using a 3-bolt camshaft.

Specifications

• Manufacturer: Crane Cams
• Part Number: 680931
• Grind Number: F-248/3600-2-8
• Product Type: Camshaft
• Camshaft Style: Mechanical Flat Tappet
• Timing Gear: 3-Bolt
• Advertised Duration: 284° Intake / 294° Exhaust
• Duration @ .050″: 248° Intake / 258° Exhaust
• Valve Lift: .540″ Intake / .560″ Exhaust
• Lobe Separation Angle: 108°
• Valve Lash (Hot): .028″ Intake / .030″ Exhaust
• Recommended RPM Range: 3,800–7,000 RPM
• Sold As: Each

Key Features

• Crane Cams performance mechanical flat tappet camshaft
• Designed for Chrysler 383–440 Big Block engines
• 3-bolt timing gear configuration
• Strong mid-range torque and upper RPM horsepower
• Excellent choice for bracket racing and aggressive street performance
• Compatible with manual transmissions or automatic transmissions with a 3,000+ RPM stall converter
• Recommended for 10.5:1–12.0:1 compression ratio engines
• Precision-ground for consistent performance and durability

Ideal For

• Mopar muscle car restorations with performance upgrades
• Street/strip big block builds
• Bracket racing
• High-performance 383 and 440 engines
• Custom engine rebuilds

Why Buy From Customville American?

With over 40 years supplying American performance and restoration parts to UK enthusiasts, Customville American offers quality components for classic Mopar, GM and Ford vehicles, helping builders achieve reliable performance and authentic restorations.