LS3 430HP Long Block

Description

LS3 LONG BLOCK
Build it your way with proven LS performance.
Chevrolet Performance LS long blocks deliver the essential power foundation of a complete crate engine at a lower cost—giving builders the freedom to complete the assembly with their own components and style.
The LS3 long block arrives ready for customization, supplied without the intake manifold, coil packs, water pump, exhaust manifolds, or other accessories—ideal for those looking to tailor their setup for a specific performance or application.
TECH SPECS
Part Numbers: 19420382 / 19432422 / 19434644 / 19435106Engine Type: LS-Series Gen IV Small-Block V-8Displacement: 376 cu in (6.2L)Bore x Stroke: 4.065 x 3.622 in (103.25 x 92 mm)Block (P/N 12623967): Cast aluminum with 6-bolt, cross-bolted main capsCrankshaft (P/N 12597569): Nodular ironConnecting Rods (P/N 12649190): Powdered metalPistons (P/N 19207287): Hypereutectic aluminumCamshaft Type (P/N 12623063): Hydraulic rollerValve Lift: 0.551 in intake / 0.522 in exhaustCamshaft Duration (@.050 in): 204° intake / 211° exhaustCylinder Heads (P/N 12629063): Aluminum L92-style ports, as-cast, 68cc chambersValve Size: 2.165 in intake / 1.590 in exhaustCompression Ratio: 10.7:1Rocker Arms (P/N 12669995 – Intake / 12669993 – Exhaust): Investment-cast, roller trunnionRocker Arm Ratio: 1.7:1Recommended Fuel: Premium pumpMaximum Recommended RPM: 6,600Reluctor Wheel: 58XBalanced: Internal
INSTALLATION NOTES

Assembly does not include electronics, intake manifold, fuel system, or ignition components

Comes equipped with a Chevy F-Body wet sump oil pan

Intended for pre-1976 street vehicles or off-road applications

Not designed for marine use