Year One High Performance Chevy LM7 5.3L LS 385 HP Long Block Crate Engine.

This engine was designed to be a performance upgrade for a 1999-2007 Chevy Truck LM7 or LS swap in a hot rod. Expect big mid to upper end power, will have a noticeable idle. For optimal Performance you will need headers, chassis dyno tune and upgraded injectors. Cam Specs will come with the engine.

• Horsepower: 385+
  Torque: 390+
  Block: GM 5.3L Iron LM7
  Bore/Stroke: Up to 3.809 x 3.622
  Year Range: 1999-2007
  Displacement: 323 C.I.D.
  Crankshaft: OEM GM 3.622" Stroke Internally Balanced
•                      24 tooth Reluctor wheel .857" Flange
  Connecting Rods: OE GM Forged Powder Metal 6.093"
•                                  Stock Bolts
  Pistons: Hypereutectic Dish
  Piston Rings: Moly Rings
  Compression Ratio: 9.5:1 Compression
  Camshaft: Hydraulic Roller
  Camshaft Specifications: Custom Grind
  Camshaft Bearings: Installed & Clocked to OEM Position
  Cylinder Heads: OE Aluminum 61.15cc 1.89/1.55
  Freeze Plugs: Brass Installed & Sealed
  Rocker Arms: OE Powdered Metal 1.7 Ratio
  Oil Galley Plugs: Installed & Sealed
  Weight:385

Oil: 5W30
Oil Filter: Wix or K&N Recommended Per Your Application
Fuel Delivery: OE EFI System With Tune
Intake Manifold: Stock EFI Manifold or Edelbrock

                             Carb Conversion ED2908
Fuel Injectors: Stock Inectors or Aftermarket For Optimal

                          Performance
Spark Plugs: NGK #3186 or 4177 for colder
Spark Plug Gap: .035"
Harmonic Balancer/Dampner: Stock Factory Balancer Internally

                                                    Balanced
Flex Plate / Fly Wheel: Stock Internally Balanced
Tuning: Needs Tune/Preferably Chassis Dyno Tune
Timing: Set To Factory Speciffications Via PCM Module

             (Tune Required)
Water Pump; Per Your Application
Firing Order: 1 8 7 2 6 5 4 3
Exhaust: 1 5/8 Headers
Fuel Pump: Stock
Fuel: 91-93 Octane
Ignition: Stock or Aftermarket Coils
Automatic Transmission Stall Converter: Stock or 1800