Eagle B68311060 Big Block Chevy Rotating Assembly Cylinder - 496 8

The Eagle B68311060 is a factory-balanced street and strip rotating assembly designed for Big Block Chevy 454 engines with 1-piece rear main seal. This complete internal kit builds a 496 cubic inch displacement using a 4.250-inch stroke crankshaft and 6.385-inch connecting rods, making it an ideal choice for performance enthusiasts looking for reliable power under 700 horsepower.

Complete Assembly Includes:

• Eagle cast steel crankshaft with 4.250-inch stroke
• Eagle SIR I-beam connecting rods (6.385-inch length)
• Forged pistons with 18cc dome design
• File-fit piston rings
• Rod and main bearings

Key Features:

• Factory balanced assembly - ready to install with no additional balancing required
• Designed for external balance configuration
• Builds 496 cubic inch displacement at .060-inch overbore (4.310-inch bore)
• Multiple compression ratio options depending on cylinder head chamber volume
• Rated for street and strip applications producing under 700 horsepower

This rotating assembly provides excellent value and reliability for Big Block Chevy performance builds. Part numbers beginning with "B" are pre-balanced by Eagle Specialty Products, saving time and expense during engine assembly. Note that harmonic balancer and flexplate/flywheel are not included and must be ordered separately for external balance applications.