Eagle 143003375 Ford 8BA Flathead Street Performance Rotating Assembly Kit

The Eagle 143003375 is a complete street and strip rotating assembly designed specifically for Ford 8BA Flathead engines. This kit provides the perfect balance of reliability, affordability, and performance for engines producing under 700 horsepower.

Complete Assembly Includes:

• Eagle cast steel crankshaft with 4.000-inch stroke
• Eagle H-Beam connecting rods, 7.000-inch length
• Ross forged 2618 aluminum pistons with 14cc dome, 3.375-inch bore
• Plasma-moly piston rings
• Clevite or King performance bearings
• ARP 2000 fasteners, 3/8-inch bolts

Key Specifications:

• Displacement: Approximately 286 cubic inches at 0.188-inch overbore
• Stroke: 4.000 inches
• Bore: 3.375 inches (0.188-inch oversize from standard 3.187-inch)
• Rod Length: 7.000 inches center-to-center
• Rod Journal Diameter: 2.000 inches
• Internal balance design

Important Installation Notes:

• This is an unbalanced assembly and must be balanced by a qualified machine shop before use.
• Compression ratio will need to be calculated after determining deck height and cylinder head volume.
• Recommended for naturally-aspirated, pump-gas street and performance applications

This rotating assembly offers excellent value for Ford Flathead builders looking to increase displacement and performance while maintaining reliability. The cast steel crankshaft features larger fillet radiuses for increased strength compared to OEM cranks, while still allowing the use of standard replacement bearings.