The BluePrint Engines GM LS Compatible 376 C.I. Builder Series Engine & 4L65/70E Automatic Transmission Package combines modern LS performance with a proven electronically controlled automatic transmission in a complete turnkey drivetrain solution. Producing 510 horsepower and 440 ft.-lbs. of torque, this package is designed for pro touring builds, restomods, muscle cars, street rods, and custom LS swap applications requiring reliable power and easy installation.

Built around BluePrint's high-strength LS-compatible cast iron block, the 376 C.I. engine features BluePrint aluminum cylinder heads, hypereutectic pistons, nodular iron crankshaft, forged connecting rods, and a hydraulic roller camshaft for dependable street performance with excellent throttle response. Fuel and ignition are controlled by the included Holley Terminator X Max Gen IV EFI System, featuring a complete ECU, harness, sensors, and calibration capability for modern LS swap applications.

The included 4L65/70E automatic transmission package provides smooth electronic shifting and proven GM performance capability. The complete transmission package includes the necessary components for installation, including the electronic transmission controller, torque converter, flexplate, and starter. This drivetrain combination arrives assembled from BluePrint Engines, helping simplify installation and providing a matched engine and transmission solution for your next performance build.

The BLS37684L7 Standard Edition Builder Series does not include a front accessory drive, allowing builders to select the accessory system that best fits their vehicle, clearance requirements, and styling goals.

Key Features:

• 376 C.I. GM LS Compatible Builder Series Engine
• 510 Horsepower / 440 ft.-lbs. Torque
• 4L65/70E Automatic Transmission Package
• Standard Edition Builder Series
• Holley Terminator X Max Gen IV EFI System
• Complete ECU & Engine Wiring Harness
• BluePrint Engines Calibrated EFI System
• BluePrint High-Strength Cast Iron LS-Compatible Block
• BluePrint Aluminum Cylinder Heads
• 10.7:1 Compression Ratio
• Hydraulic Roller Camshaft:
  • .612" Intake Lift
  • .585" Exhaust Lift
  • 225° Intake Duration @ .050"
  • 238° Exhaust Duration @ .050"
  • 113° Lobe Separation Angle
• Hypereutectic Pistons
• Nodular Iron Crankshaft
• 3.622" Stroke
• 6.098" Connecting Rods
• GM LS3-Style Intake Manifold
• Drive-by-Wire Throttle Body
• Fuel Rails & Injectors Included
• Coil Packs, Spark Plugs & Wires Included
• Non-Weighted Flexplate
• Non-Weighted Harmonic Balancer
• No Front Accessory Drive Included
• Recommended Fuel: 91+ Octane

Transmission Package Includes:

• GM 4L65/70E Automatic Transmission
• 1996-2008 13-Pin Harness
• Electronic Transmission Controller
• 2200-2400 RPM Stall Torque Converter
• Flexplate
• Starter

Transmission Gear Ratios:

• 1st Gear: 3.059:1
• 2nd Gear: 1.625:1
• 3rd Gear: 1.000:1
• 4th Gear: 0.696:1

Fitment Applications:

Designed for custom GM LS-powered vehicles including:

• Chevrolet Camaro LS Swaps
• Pontiac Firebird LS Swaps
• Chevrolet Corvette Builds
• Chevrolet Chevelle Restomods
• Chevrolet Nova Builds
• Chevrolet C10 Trucks
• GM G-Body Vehicles
• Street Rods
• Pro Touring Cars
• Custom Performance Builds

Note: Verify engine mounts, transmission crossmember, driveshaft length, cooling system, exhaust clearance, fuel system requirements, and accessory drive configuration before installation.

Installation Notes:

• Engine and transmission package ships fully assembled.
• Includes a BluePrint-calibrated Holley Terminator X Max EFI system. Do not overwrite the supplied calibration using standard Holley setup procedures.
• Requires appropriate LS swap mounts, transmission crossmember, driveshaft, cooling system, and fuel system components.
• Front accessory drive is not included; select the accessory system required for your application.
• BluePrint recommends Air Intake Kit BPPLS01013 to maintain proper MAF calculations and dyno-tested ECU calibration.