BluePrint GM LS3-Compatible Base Dressed Crate Engine – Holley Terminator X Max EFI – 376 c.i. – 530 HP
PSLS3763CTF
530 HP · 495 lb-ft · 376 c.i. · 91+ Octane · Dyno Tested · 30-Month/50,000-Mile Warranty
Built for LS swaps that need a complete, matched engine-management package, this GM LS3-compatible 376 crate engine produces 530 horsepower and 495 lb-ft of torque. It uses a high-strength LSX-style cast-iron block, BluePrint aluminum cylinder heads, a hydraulic roller camshaft, a nodular-iron crankshaft, forged connecting rods, and hypereutectic pistons.
This base-dressed engine includes the GM plastic intake manifold, drive-by-wire throttle body, 42 lb/hr fuel injectors, fuel rail, coil packs, spark plugs and wires, water pump, LS swap oil pan, harmonic balancer, throttle pedal, sensors, and a Holley Terminator X Max ECU and wiring harness. The ECU is supplied with a BluePrint calibration matched to the engine’s 58x crank and 4x cam sensor configuration.
The Holley system adds self-learning fuel control, Bosch LSU 4.9 wideband support, a 3.5" touchscreen handheld, internal data logging, configurable inputs and outputs, and USB/CAN laptop tuning. Transmission control is supported, but a separate transmission harness is required. The accessory drive, starter, flexplate or flywheel, exhaust, cooling system, fuel-delivery system, and vehicle-specific installation components are sold separately.
Need to confirm fitment or get an exact delivered price? Call or text our team before ordering.
Includes:
- GM LS Compatible 376 c.i. Crate Engine
- BluePrint Aluminum LS3-Style Cylinder Heads
- Hydraulic Roller Camshaft
- LS Valve Covers
- GM Plastic LS3-Style Intake Manifold
- Holley Terminator X Max ECU
- Holley Engine Wiring Harness
- BluePrint-Calibrated ECU Base Map
- 3.5-Inch Holley Touchscreen Controller
- Drive-by-Wire Throttle Body
- Drive-by-Wire Throttle Pedal
- 42 lb/hr Fuel Injectors
- Fuel Rails
- Ignition Coil Packs
- Spark Plugs
- Spark Plug Wires
- Water Pump
- LS Swap Oil Pan
- Windage Tray
- Oil Pickup Screen
- Harmonic Balancer
- Engine Sensors
- Individual Engine Dyno Documentation
Note: Flexplate or flywheel, transmission-control harness, starter, front accessory drive, air-intake system, headers and exhaust, external fuel-delivery components, cooling system, transmission, and vehicle-specific installation hardware are NOT included. A non-weighted flexplate or flywheel is required.
Specifications
| Specification | Details |
|---|---|
| Engine Family | GM LS Compatible |
| Manufacturer Part Number | PSLS3763CTF |
| Displacement | 376 Cubic Inches |
| Horsepower | 530 HP |
| Torque | 495 lb-ft |
| Compression Ratio | 10.7:1 |
| Block Material | High-Strength Cast Iron, LSX Style |
| Bore | 4.0662" |
| Stroke | 3.622" |
| Main Caps | 6-Bolt |
| Rear Main Seal | One-Piece |
| Oiling System | Priority Main Oiling |
| Crankshaft | Nodular Iron |
| Connecting Rods | 6.125" Forged Steel |
| Connecting Rod Bolts | 150,000 PSI |
| Pistons | Hypereutectic Flat Top, 2cc |
| Balance | Internal |
| Reluctor Wheel | 58x |
| Cam Sensor | 4x |
| Cylinder Heads | BluePrint Aluminum LS3 Style |
| Combustion Chamber | 69cc |
| Intake Runner Volume | 259cc |
| Exhaust Runner Volume | 102cc |
| Intake Valve | 2.165" |
| Exhaust Valve | 1.590" |
| Camshaft | Hydraulic Roller |
| Cam Lift | .612" Intake / .585" Exhaust |
| Cam Duration @ .050 | 225° Intake / 238° Exhaust |
| Lobe Separation | 113° |
| Fuel Injection | Holley Terminator X Max EFI |
| Throttle Body | Drive-by-Wire |
| Fuel Injectors | 42 lb/hr at 58 PSI |
| Intake Manifold | GM Plastic LS3-Style Intake |
| Fuel Requirement | 91+ Octane |
| Oil Capacity | 6 Quarts |
| Recommended Stall Converter | 2,200 RPM or Higher |
| Firing Order | 1-8-7-2-6-5-4-3 |
| Warranty | 30 Months / 50,000 Miles |
Holley Terminator X Max Features
- BluePrint-calibrated ECU base map
- Real-time fuel-map learning
- Bosch LSU 4.9 wideband oxygen sensor control
- Closed-loop air/fuel ratio tuning
- Eight high-impedance injector drivers
- Integrated 1-bar MAP sensor
- Support for external higher-bar MAP sensors
- Four configurable inputs
- Two configurable outputs
- Electric fan control capability
- Nitrous control capability
- Boost control capability with supporting components
- Free Holley PC tuning software
- USB and CAN connectivity
- Internal data logging
- Real-time gauge displays
- 3.5-inch touchscreen setup controller
- Compatible electronic transmission control with an additional transmission harness
Fitment Notes
Built by Off-Road People, Supported by Off-Road People
Wide Open Design has more than 20 years of experience building LS-powered rock crawlers, trail rigs, race cars, and custom tube-chassis vehicles. We can help you match the engine with the correct cooling system, fuel delivery, transmission, drivetrain, and installation components for your build.
- Designed for custom LS swap and performance projects.
- Compatible with most GM LS engine mounts and accessory systems.
- Accepts OEM LS3-style front and rear covers.
- Features a 58x crank reluctor wheel and 4x cam sensor.
- Uses EV6-style fuel injectors.
- Includes a drive-by-wire throttle body and matching throttle pedal.
- The Holley Terminator X Max ECU is calibrated by BluePrint Engines for this engine combination.
- Do not overwrite the supplied BluePrint calibration with a generic Holley startup calibration.
- Electronic transmission control requires a compatible transmission-specific wiring harness, sold separately.
- Compatible with many popular GM manual and automatic transmissions, including TH350, TH400, 4L60E, 4L80E, Powerglide, and Magnum manual transmissions, when the appropriate bellhousing, converter, flexplate, flywheel, and control components are used.
- A non-weighted flexplate or flywheel is required because the engine is internally balanced.
- A complete external fuel system capable of maintaining the required fuel pressure and flow must be supplied separately.
- BluePrint recommends using the specified air intake kit or a properly designed intake system to maintain the airflow characteristics used during dyno testing.
- Verify oil pan, header, accessory drive, throttle pedal, and transmission clearance before installation.
- Final installation and vehicle-specific tuning should be completed by a qualified installer.
Tech Insight
The 376 cubic inch LS3 platform has become one of the most popular engine combinations for off-road and performance builders because it delivers an excellent combination of horsepower, torque, compact packaging, reliability, and aftermarket support.
The high-strength cast iron LSX-style block provides increased deck thickness, reinforced webbing, extended cylinder skirts, and a six-bolt main design. These features make it a strong choice for vehicles exposed to severe vibration, repeated shock loads, large tires, heavy drivetrains, and sustained high-RPM operation.
The Holley Terminator X Max system removes much of the guesswork associated with matching an aftermarket EFI system to a crate engine. The ECU, injectors, throttle body, ignition components, sensors, and wiring are supplied as a matched package, and the ECU includes a base calibration developed specifically for this engine combination.
The system also gives builders room to expand. Configurable inputs and outputs can support electric cooling fans, nitrous controls, boost control components, and additional vehicle systems. The Terminator X Max can also control compatible electronic transmissions when the correct transmission harness is installed.
For builders who want a powerful LS engine without sourcing and matching every fuel injection and ignition component individually, this base-dressed package provides a more complete and efficient path to a running vehicle.
Frequently Asked Questions
What is included with this crate engine?
This package includes the assembled 376 cubic inch engine, aluminum cylinder heads, hydraulic roller camshaft, LS3-style intake manifold, drive-by-wire throttle body and pedal, fuel injectors, fuel rails, ignition coils, spark plugs, plug wires, water pump, LS swap oil pan, harmonic balancer, engine sensors, Holley Terminator X Max ECU, engine wiring harness, and 3.5-inch touchscreen controller.
Is the Holley Terminator X Max already tuned?
The ECU includes a base calibration developed by BluePrint Engines for this specific engine combination. The system also features real-time fuel learning and closed-loop air/fuel ratio control.
Vehicle-specific adjustments may still be required based on the fuel system, exhaust, intake routing, transmission, tire size, gearing, and intended use.
Should I follow the standard Holley setup wizard?
BluePrint Engines states that the supplied ECU is already calibrated for this engine. The generic Holley startup calibration should not be used to overwrite the BluePrint calibration.
What is the difference between this engine and the long-block version?
The long-block engine requires the builder to supply the intake manifold, throttle body, injectors, fuel rails, ignition coils, ECU, wiring harness, sensors, and engine management system.
This base-dressed version includes those components along with a calibrated Holley Terminator X Max EFI system, making it much closer to a complete swap-ready engine package.
Is this a turnkey engine?
This is a base-dressed engine with a complete EFI and ignition management system, but it is not a fully turnkey vehicle installation.
The builder must still supply the accessory drive, starter, battery and charging system, external fuel system, air intake, exhaust, cooling system, engine mounts, transmission components, flexplate or flywheel, and vehicle-specific installation hardware.
Is this a good engine for an LS swap?
Yes. The 376 LS is a popular choice for Jeep swaps, rock crawlers, muscle cars, classic trucks, hot rods, race cars, prerunners, Ultra4 vehicles, and custom off-road builds because of its strong power output, compact design, reliability, and aftermarket support.
Can this engine be used for rock crawling?
Yes. The 495 lb-ft of torque, compact LS platform, cast iron block, and complete EFI system make it a strong option for rock crawlers, trail rigs, buggies, and Ultra4 vehicles.
Proper gearing, cooling capacity, fuel delivery, oil control, and transmission selection are still critical for low-speed off-road use.
What fuel should I run?
This engine is designed for premium gasoline with a minimum recommendation of 91 octane.
Does the ECU control an electronic transmission?
The Holley Terminator X Max can control compatible electronic automatic transmissions. A separate transmission-specific wiring harness and proper configuration are required.
Does this engine include a flexplate or flywheel?
No. A flexplate or flywheel is not included. Because the engine is internally balanced, it requires a compatible non-weighted flexplate or flywheel.
Does this package include the fuel pump and regulator?
No. The engine includes the injectors and fuel rails, but the external fuel pump, regulator, filters, tank, lines, fittings, and plumbing must be supplied separately.
Does this engine include an accessory drive?
No. The alternator, power steering pump, air-conditioning compressor, brackets, pulleys, tensioner, and belt are not included.
Will this engine require custom tuning?
The ECU includes a BluePrint base calibration and self-learning fuel control. Final adjustments may still be needed based on the completed vehicle, exhaust system, intake design, transmission, gearing, and intended use.
