Overview:

The BluePrint Engines GM LS-Compatible 427 C.I. Pro Series Engine delivers 585 horsepower and 520 ft-lbs of torque, built for serious performance. As one of the most popular engine platforms for street cars and restomods, the LS-compatible design offers proven power and versatility. This package features LS3-style aluminum cylinder heads, an 11:1 compression ratio, hydraulic roller cam, forged pistons, and a forged crankshaft housed in a BluePrint high-strength cast iron block. The deluxe dressed setup includes a polished serpentine front drive pulley kit, BluePrint-calibrated ECU and harness, drive-by-wire throttle pedal, sensors, and throttle body—making it a true plug-and-play powerhouse for any street machine.

Description: 

• Horsepower & Torque: 585 Horsepower / 520 FT LBS
• Compression Ratio: 11:1
• BluePrint Engines LS3 Aluminum Heads
• BluePrint Engines Hydraulic Roller Cam
  
• BluePrint Engines Forged Crank
• BluePrint Engines Forged Pistons
  

Block:

• 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
• 4.0695" Bore
  
• 6-Bolt Main
  

Rotating Assembly:

• Forged Crankshaft
• 4.125" Stroke
• Forged 6.125" Connecting Rods
• Forged Pistons
• Internally Balanced Front and Rear

Cylinder Heads:

• BluePrint Aluminum Cylinder Heads - PS8015
• 69cc Chamber
• 2.165" Intake / 1.590" Exhaust Valves
• 259cc Intake /102cc Exhaust Runners
  

Cam Specs:

• Hydraulic Roller
• .624 Intake / .624 Exhaust Lift
• 239 Intake / 255 Exhaust Duration
• @.050-114 Degree Lobe Separation

Ignition Timing:

• ECM Supplied with Calibration
• Not Capable of Transmission Control
• Transmission Controller Required

Also Includes:

• Front Accessory Drive with Water Pump, Alternator, Power Steering Pump, and A/C Compressor
• Drive by Wire Throttle Body - BPP12191019
  
• LS3 Cast Aluminum Intake Manifold
  
• LS Swap Oil Pan - BPP81074
  
• Water Pump - BPPLS126WP
• Engine Harness and ECU Kit
  
• Injectors and Fuel Rail Kit
  
• Spark Plugs & Wiring
  
• Harmonic Balancer 
  
• Timing Cover
• Valve Covers
  
• Coil Packs
• Gas Pedal
  

Notes:

• This engine requires a non-weighted flex plate/flywheel.
• Recommended Fuel: 91 Octane.
• The front accessory drive on this engine fits many vehicles, however it is the customer responsibility to accurately measure and confirm fitment.  Note this is a low-profile design, but things such as power steering hoses, alternator wiring, and additional fittings/fabrication may be required on some vehicles.
• BluePrint Engines recommends a 2200+ RPM stall converter.
• 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.
• The Included LS controller package is for engine control only. Does not contain any transmission or body control. The ECU comes with calibration that is optimal for our engine, however, please note that vehicle parameters such as gearing, tire size, vehicle weight, air intake, headers, etc. may necessitate additional tuning once installed into your specific vehicle. The included ECU is unlocked for further refinement at your local dyno shop if required.
• BluePrint Engines Recommends Air Intake Kit BPPLS01013 to ensure correct MAF calculations and Dyno calibration are maintained with the provided ECU / tuning.