LS Classic GMLS9006 6.2L 376 CID Classic Custom Crate Engine

Description

Combine modern reliability with vintage aesthetics using the LS Classic Series GMLS9006 Crate Engine. Displacing 6.2 liters across 376 cubic inches, this custom finished LS3 power plant outputs 430 horsepower at 5900 RPM and 424 lb-ft torque at 4600 RPM. Custom script valve covers and hidden multi port fuel injection produce timeless hot rod style with fuel injected drivability.

Solid cast aluminum LS3 cylinder block architecture features deep skirt side walls anchored by six bolt cross bolted main caps. The reciprocating kit contains a nodular iron 3.622 inch stroke crankshaft, forged powdered metal rods, and hypereutectic pistons inside 4.065 inch bores. The resulting 10.7:1 compression ratio operates on 93 octane pump gasoline. Total dressed dry weight measures 440 lbs.

Key Features of LS Classic Series GMLS9006

Buy LS Classic Series GMLS9006 crate engine packages to modernize custom hot rods and vintage pickups with distinctive retro appearance. The turnkey package integrates vintage valve covers, fake distributor, hidden throttle body injection, and modern engine controller.

• Custom script retro valve covers conceal modern LS coil packs underneath.
• Fourteen inch round chrome air cleaner conceals modern electronic drive by wire throttle body induction.
• Simulated vintage ignition distributor mounts in classic block location to house engine wiring feeds.
• LS3 rectangular port aluminum cylinder heads drop front axle weight while maximizing airflow.
• Complete standalone engine management package includes pre calibrated ECU, wiring harness, and throttle pedal.
• Six bolt cross bolted iron main caps eliminate crank journal flex under elevated track RPM loads.
• LS Classic Series GMLS9006 internal hardware meets exact OE standards for modern vehicle reliability.

Custom Script LS3 Dyno Output Verification

Testing on water brake engine dynamometers validates 430 brake horsepower at 5900 RPM and 424 lb-ft torque at 4600 RPM across a wide 2500 to 6500 RPM band. Cam duration measures 204 degrees intake and 211 degrees exhaust at 0.050 inch lift, producing 0.551 inch intake and 0.522 inch exhaust lift. The engine draws 15 in-Hg vacuum at 750 RPM on 93 octane fuel, holding 45 to 65 PSI hot oil pressure.

Retrofit Hot Rod Chassis Envelope Bounds

Standard GM LS architecture drops between subframe rails on vintage hot rods, custom roadsters, and classic trucks when paired with swap engine mount plates. The crankshaft accepts 4L60E, 4L80E, or manual transmission bellhousings using standard LS flexplates or flywheels. Low profile intake components clear factory hood lines, while the retrofit oil pan clears intermediate steering linkages.

Modern Retrofit Startup Service Protocols

Pre lube internal galleries with high zinc break in oil using an oil priming tank before starting the engine. This modern LS crate engine is not engineered for marine seawater cooling, forced induction boost exceeding six PSI on stock ring gaps, or unmetered nitrous systems.

• Drain initial break in oil and replace the spin on filter after the first 500 road miles.
• Perform regular oil changes every 3000 miles or six months with high zinc synthetic oil.
• Examine high pressure EFI fuel lines, electrical connections, and oxygen sensor fittings every 6000 street miles.

Custom Retro LS3 Shipped Manifest Contents

Protection includes a 24-Month / 50,000-Mile factory limited warranty guarding against defective components. The shipment crate contains the assembled retro styled engine, hidden EFI intake, 14 inch chrome air cleaner, custom script valve covers, standalone ECU, wiring harness, flexplate, and official warranty documentation.