LS3 430HP Long Block

Product Details

Dipstick, Dipstick Tube, and Steam vent pipe do not come with Long Block engines and can be purchased below if using the included oil pan

LS3 Long Block

LS long-blocks from Chevrolet Performance offer the core capabilities of complete crate engines at a lower cost, allowing builders to finish the assembly their way. The LS3 long block is delivered without the intake manifold, coil packs, water pump, exhaust manifolds or other accessories.

TECH SPECS
Part Number: 19420382 / 19432422 / 19434644 / 19435106
Engine Type: LS-Series Gen IV Small-Block V-8
Displacement (cu in): 376 cu in (6.2L)
Bore x Stroke (in): 4.065 x 3.622 (103.25 x 92mm)
Block (P/N 12623967): Cast-aluminum with 6-bolt, cross-bolted main caps
Crankshaft (P/N 12597569): Nodular iron
Connecting Rods (P/N 12649190): Powdered metal
Pistons (P/N 19207287): Hypereutectic aluminum
Camshaft Type (P/N 12623063): Hydraulic roller
Valve Lift (in): .551 intake / .522 exhaust
Camshaft Duration (@.050 in): 204° intake / 211° exhaust
Cylinder Heads (P/N 12629063): Aluminum L92-style port; as cast with 68cc chambers
Valve Size (in): 2.165 intake / 1.590 exhaust
Compression Ratio: 10.7:1
Rocker Arms (P/N 12669995 int): Investment-cast, roller trunnion
Rocker Arms (P/N 12669993 exh): Investment-cast, roller trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: Premium pump
Maximum Recommended rpm: 6,600
Reluctor Wheel: 58x
Balanced: Internal

INSTALLATION NOTES
• Assembly does not include any electronics, intake manifold, fuel system , ignition. 
• Includes Chevy F-Body wet sump oil pan
• Intended for pre-1976 street vehicles or any off-road vehicle
• Not intended for marine applications

California Proposition 65 Warning