The BluePrint Engines GM LS Compatible 376 C.I. Builder Series Engine & 4L65/70E Automatic Transmission Package combines proven LS performance with a dependable electronically controlled automatic transmission in a complete turnkey drivetrain. Producing 510 horsepower and 440 ft.-lbs. of torque, this package is engineered for muscle cars, pro touring builds, street rods, and custom LS swap projects requiring outstanding drivability and modern electronic fuel injection.

At the heart of the package is BluePrint's 376 C.I. LS-compatible Builder Series engine, featuring a high-strength cast iron block, BluePrint aluminum cylinder heads, hypereutectic pistons, forged connecting rods, a nodular iron crankshaft, and a hydraulic roller camshaft designed for responsive throttle, broad torque, and dependable street performance. Fuel and ignition are managed by the included Holley Terminator X Max Gen IV EFI System, complete with ECU, wiring harness, sensors, and BluePrint's pre-loaded calibration for simplified installation and exceptional drivability.

This version includes the complete Natural Front Accessory Drive Kit, giving the engine a clean factory-style aluminum appearance while supplying the alternator, power steering pump, water pump, and A/C compressor. The 4L65/70E automatic transmission arrives factory assembled to the engine and includes the required electronic controller, torque converter, flexplate, and starter for a professionally matched drivetrain package.

Key Features:

• 376 C.I. GM LS Compatible Builder Series Engine
• 510 Horsepower / 440 ft.-lbs. Torque
• 4L65/70E 4-Speed Automatic Transmission
• Standard Edition Builder Series
• Natural Front Accessory Pulley Kit
• Holley Terminator X Max Gen IV EFI System
• Complete ECU & Engine Wiring Harness
• BluePrint High-Strength Cast Iron LS 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
• Forged 6.098" Connecting Rods
• BluePrint Cast Aluminum Intake Manifold
• Drive-by-Wire Throttle Body
• Fuel Rails & Injectors Included
• Coil Packs, Spark Plugs & Wires Included
• Complete Natural Finish Front Accessory Drive
• Non-Weighted Harmonic Balancer
• Non-Weighted Flexplate
• Premium 91+ Octane Recommended
• Dyno Tested by BluePrint Engines

Transmission Package Includes:

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

Gear Ratios:

• 1st: 3.06:1
• 2nd: 1.62:1
• 3rd: 1.00:1
• 4th: 0.70:1

Fitment Applications:

Designed for custom GM LS-powered vehicles including:

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

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

Installation Notes:

• Ships with the engine and transmission factory assembled.
• Includes a Holley Terminator X Max EFI System with BluePrint calibration.
• Do not overwrite the supplied ECU calibration using the standard Holley setup procedure.
• Includes the complete Natural Finish Front Accessory Drive Kit.
• BluePrint recommends Air Intake Kit BPPLS01013 to maintain proper MAF calculations and dyno-tested calibration.
• Premium 91+ octane fuel is recommended.