Crate Engine SBC 350/400 HP (ASA LM Spec.Engine)

The Crate Engine SBC 350/400 HP (ASA LM Spec.Engine) from Chevrolet Performance is a turn-key, ready-to-run small-block power plant engineered for operators who demand reliable, proven propulsion in vehicles built for off-grid missions, patrol operations, or sustained-load tactical transport. This crate engine delivers the dependability required in high-stress field environments where engine failure is not an option. Whether you're building out a purpose-built law enforcement support vehicle, a long-range patrol rig, or a logistics platform that must operate in remote or austere conditions, the SBC 350/400 HP unit provides established Chevrolet Performance engineering with minimal integration complexity.

Built to ASA (American Speed Association) Limited Motorsports specification, this small-block Chevy produces 400 horsepower from a displacement-proven 350-cubic-inch platform, delivering the torque curve and sustained power delivery required for heavy-duty applications. The engine arrives fully assembled, balanced, and dyno-certified, eliminating field assembly variables and ensuring consistent performance from first startup. Cast-iron construction and forged internal components withstand temperature extremes, altitude variation, and the thermal stress of continuous operation under load. The SBC architecture offers decades of proven reliability in military and law enforcement fleet applications, with readily available parts support and straightforward diagnostic procedures.

This engine is ideal for builders integrating modern powertrains into Gen-1 or Gen-2 Chevrolet chassis platforms, or for retrofit applications in older Chevrolet, GMC, or Pontiac vehicles designated for tactical or support roles. At 465 pounds, the engine maintains the compact footprint of classic small-block geometry, fitting standard engine bays without extensive structural modification. The ASA LM spec ensures compatibility with modern fuel systems, emissions monitoring (where required), and standard Chevrolet bolt patterns for intake manifolds, alternators, and accessory mounts. Professional installation by a qualified technician familiar with Chevrolet crate engine integration is recommended to ensure proper fuel delivery, ignition timing, and cooling system configuration.