BluePrint Engines 427 c.i. GM LS Compatible Builder Series - Standard Edition - Fuel Injected - 4L65/70E Automatic Transmission. (PART #BPE-BLS42734L7)

BluePrint Engines unleashes big-cube LS power with this 427 c.i. Standard Edition Builder Series package paired to a 4L65/70E automatic transmission. Delivering brutally responsive torque and high-revving horsepower, this setup blends modern drivability with serious performance potential. The Holley Terminator X EFI system keeps fueling razor-sharp for instant starts, clean throttle response, and easy, on-the-fly tuning. Built with premium components, precision machining, and BluePrint’s proven durability, the 427 is designed to handle hard pulls, long cruises, and everything in between.

For builders wanting a turnkey LS powerhouse that’s ready for real-world street duty with serious muscle on tap, this 427/4L65-70E combo checks every box.

Blocks:

• BluePrint Engines High Strength Cast Iron (LSX Style) Block
• Increased Deck Thickness and Strength Webbing
• Utilizes OEM LS3 Front and Rear Covers
• Improved Water Jacket Design
• Extended Cylinder Skirt
• 1-Piece Rear Main Seal
• Priority Main Oiling
• 4.0665" Bore
• 6-Bolt Main

Cylinder Heads:

• BluePrint Aluminum Cylinder Heads - PS8015
• 70cc Chamber
• 2.165" Intake / 1.590" Exhaust Valves
• 259cc Intake / 102cc Exhaust Runners

Rotating Assembly:

• Forged 6.125" Connecting Rods
• Internally Balanced Front and Rear

Included items:

• LS Swap Oil Pan - Windage Tray - Pick Up Screen
• BluePrint Engines Fuel Injectors and Rail
• DBW Throttle Body - BPP12191019
• Water Pump - BPPLS126WP
• Throttle Pedal, and Sensors
• GM Plastic Intake Manifold
• Spark Plugs & Wires
• Harmonic Balancer
• Coil Packs

Assembled with Complete Performance Built 4l65/70e Four Speed Automatic Transmission Package:

• 4L65/70E Complete Package
  • (1996-2008 13-Pin Harness)
• Electronic Transmission Controller Included
• 2200-2400 Stall Torque Converter
• Flex Plate
• Starter
  • First Gear Ratio: 3.059:1
  • Second Gear Ratio: 1.625:1
  • Third Gear Ratio: 1.000:1
  • Fourth Gear Ratio: 0.696:1

Holley Terminator X Max Specific Features and Benefits:

• Real Time Fuel Map Learning Simplifies Tuning by Dynamically Adjusting the Base Fuel Rate
• On Board Bosch LSU 4.9 Wideband Control, Enabling Accurate AFR Readings and Closed Loop Tuning
• Eight High Impedance Injector Drivers, Ideal for Stock LS Injectors and Holley EFI Injectors
• Integrated 1-Bar MAP Sensor for Naturally Aspirated or Nitrous Setups, with Harness Support for External Higher Bar Sensors if needed
• 4 Configurable Inputs (12V, Ground, 5V, Frequency) and 2 Outputs (Ground, PWM) - Ideal for Electric Fans, Boost Control Solenoids, Nitrous Control and more
• Free PC Tuning Software via USB/CAN Interface for Full Laptop Control and Advance Setup
• Integrated 3.5" Touchscreen Handheld with Setup Wizard, Internal Data Logging, and Real Time Gauge Displays
• Terminator X Max ECU will Include a Base Timing Map Pre-Configured for this engine

Notes:

• Please note, It is not necessary to run the Holley setup wizard, as this will erase the existing calibration loaded by BluePrint Engines. The ecu is fully unlocked and tunable for further adjustments once installed in customer vehicle.
• Retro fit oil pan will fit most 1955-1995 GM front engine, RWD, V8 cars Not for use in pollution-controlled vehicles or in dry sump applications.
• BluePrint Engines Recommends Air Intake Kit BPPLS01013 to ensure correct MAF calculations and Dyno calibration are maintained with the provided ECU / tuning.
• Engine/Trans Package Ships assembled