SBF Cast Steel Crank - 3.400 Stroke

The SBF Cast Steel Crank - 3.400 Stroke is a precision-engineered crankshaft assembly designed for high-performance small-block Ford applications requiring durable, reliable bottom-end components. Built from cast steel construction, this crankshaft is engineered to handle sustained load cycles in both street and light performance environments where stock or mildly modified engine builds demand dependable rotating assembly geometry. Whether you're rebuilding a classic small-block Ford engine or upgrading an existing platform, this crank provides the foundation for consistent performance and longevity.

The 3.400-inch stroke specification defines the piston travel distance within the cylinder bore, directly influencing displacement, torque curve, and engine character. Cast steel construction offers superior impact resistance and vibration damping compared to lighter alternatives, making it ideal for street applications where reliability supersedes maximum RPM capability. At 46.6 pounds, the crankshaft's mass provides the rotational inertia necessary for smooth idle quality and predictable acceleration characteristics across broad RPM ranges. The precision-balanced design minimizes harmonic vibration, reducing stress on accessory drive systems, oil seals, and main bearings during extended operation.

This crank is compatible with small-block Ford engine families including 260, 289, and 302-cubic-inch displacements, making it suitable for restoration projects, vintage muscle car rebuilds, and practical performance upgrades. Installation requires proper alignment with compatible connecting rods, pistons, and bearings; block decking and crank grinding should be performed by experienced machine shops to ensure optimal clearances and balance. The cast steel construction maintains reasonable material cost while delivering proven durability in mild-to-moderate boost applications and naturally aspirated street builds where peak power demands remain under 450 horsepower.