SBF Rotating Assembly Kit 289/302

The EAGLE SBF Rotating Assembly Kit 289/302 is a complete, ready-to-install engine rotating assembly engineered for Small Block Ford platforms requiring high-displacement performance. This kit is built for restoration shops, performance builders, and serious engine rebuilders who demand factory-grade reliability paired with forged internals designed to handle elevated horsepower and sustained load cycles. The rotating assembly serves as the mechanical core of any engine build—connecting the crankshaft, pistons, and connecting rods into a balanced, synchronized system that converts combustion pressure into rotational power.

This kit features a cast crankshaft paired with forged pistons, 5.400-inch I-beam connecting rods, a 3.400-inch stroke, and a 4.030-inch bore, delivering 347 cubic inches of displacement. Forged pistons resist detonation and ring flutter under boost and sustained RPM, while I-beam rod geometry provides superior strength-to-weight ratio compared to stock stamped designs. The 3.400-inch stroke and 4.030-inch bore combination yields a slightly oversquare configuration ideal for mid-range torque and RPM capability. Cast cranks offer cost-effectiveness without sacrificing reliability when matched with quality rod and piston combinations, making this assembly a proven choice for street, marine, and light competition builds.

Builders restoring 289 or 302 Small Block Ford engines will find this kit compatible with original block castings and standard-bore specifications. Installation requires proper machine shop preparation—align honing, crank inspection, and piston-to-wall clearance verification ensure longevity and peak performance. The kit's 91-pound assembly ships fully machined and ready for final assembly, reducing lead time for builds targeting street performance, weekend cruisers, or vintage racing applications. Pair this rotating assembly with quality oil circulation, appropriate carburetor or fuel injection sizing, and factory-style or performance ignition timing for reliable, repeatable results across a wide range of Small Block Ford platforms.