SBC Balanced Rotating Assembly 383 .030

The SBC Balanced Rotating Assembly 383 .030 by Eagle is a complete, street-proven rotating assembly engineered for small-block Chevrolet builders who demand both reliability and performance. This fully balanced unit eliminates the guesswork and labor associated with sourcing individual components—crankshaft, connecting rods, and pistons arrive as a matched set, ready for engine builders and serious enthusiasts to install. Whether you're rebuilding a 383 stroker for a classic muscle car, hot rod, or performance street machine, this assembly delivers the foundation every high-output SBC platform requires.

Factory-balanced rotating assemblies eliminate dynamic imbalance issues that plague individually sourced components and reduce harmful vibration at sustained RPM. The .030 over piston specification accommodates a 383 cubic-inch displacement (increasing the stock 350's bore from 4.00" to 4.03"), allowing you to pair this assembly with a 3.75" stroker crankshaft to reach the popular 383cc platform. Eagle's rotating assemblies are precision-manufactured to OEM tolerances, ensuring proper ring seating, connecting rod clearance, and piston-to-valve geometry when installed in a properly prepared block with correct deck height and honing.

This assembly is ideal for engine builders, performance shops, and experienced home machinists tackling serious displacement increases without the risk of balancing errors. Before installation, verify your block has been bored to .030 over specification, decked for proper compression height, and honed to match piston ring requirements. Verify crankshaft main journal and connecting rod bore sizes match the assembly specifications, and consult your engine builder's manual for correct torque specs and assembly sequence. Weighing 104 lbs, this is a substantial component that demands proper handling and installation in a fully prepared engine block.