Chevrolet Performance LS3 Long Block – 6.2L, 430 HP, Gen IV LS-Series Engine

Build Your Way with Chevrolet’s LS3 Long Block

Alright, y’all, let’s get down to business. If you’re after the legendary LS3 platform but want the freedom to customize it your way, the Chevrolet Performance LS3 Long Block is what you need. This 6.2L Gen IV Small-Block V-8 delivers the same solid foundation as the full crate engine but leaves room for you to make it your own. With 430 horsepower potential, it’s ready for street, track, or off-road builds.

What’s Included?

This long block setup is stripped down to the essentials, giving builders the core they need:

• Cast-Aluminum Block with 6-bolt, cross-bolted main caps for maximum durability.
• Nodular Iron Crankshaft: Built to handle serious torque.
• Powdered Metal Connecting Rods: Proven performance and reliability.
• Hypereutectic Aluminum Pistons: Designed for durability and efficiency.

Performance Highlights

• Hydraulic Roller Camshaft:
  • Lift: .551" intake / .522" exhaust.
  • Duration (@ .050"): 204° intake / 211° exhaust.
• L92 Aluminum Cylinder Heads:
  • 68cc chambers with optimized airflow for power and efficiency.
  • Valve Size: 2.165" intake / 1.590" exhaust.
• Compression Ratio: 10.7:1 – Runs on premium pump gas.
• Maximum RPM: 6,600 – Built to rev hard and run smooth.

Perfect for Custom Builders

This LS3 long block is the ideal starting point for pre-1976 street vehicles, off-road rigs, or any custom project. Whether you’re building a vintage cruiser or a performance beast, this engine provides the versatility and reliability you need.

What You’ll Need to Add

The LS3 Long Block gives you the core essentials, but here’s what you’ll need to finish the build:

• Electronics and Ignition
• Intake Manifold
• Fuel System
• Coil Packs
• Steam Vent Pipe, Dipstick, and Dipstick Tube (compatible with the included oil pan).

Installation Notes

• Includes Chevy F-Body wet sump oil pan.
• Intended for pre-1976 street vehicles or off-road builds.
• Not for marine applications.