Overview:

The LS-compatible layout has become a favorite for its rock-solid reliability and proven track record, this BluePrint 427 c.i. Pro Series is a street-ready powerhouse built for performance. Delivering a power packed 600 horsepower and 530 ft-lbs of torque, this popular LS-compatible engine is perfect for restomods, street machines, and pro-touring builds. At its core is a high-strength BluePrint cast iron block with LSX-style features—thicker decks, reinforced webbing, and extended cylinder skirts for added durability. It's topped with LS3-style aluminum heads, a 11:1 compression ratio, hydraulic roller cam, hypereutectic pistons, a nodular iron crankshaft, and BluePrint Engines Fabbed Aluminum Intake Manifold.

Description: 

• Horsepower & Torque: 600 Horsepower / 530 ft. lbs. Torque
• Compression Ratio: 11:1
• BluePrint Engines LS3 Aluminum Heads
• BluePrint Engines Hydraulic Roller Cam
• BluePrint Engines Forged Pistons
  
• BluePrint Engines Forged Crank

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

Also Includes:

• This engine Does NOT come with a Fuel Injection ECU and Wiring Harness
• LS3 Fabricated Intake Manifold & Fuel Rail - BPP822112
• Drive by Wire Throttle Body - BPP12191019
• Retro Fit Oil Pan - BPP81074
• Water Pump - BPPLS126WP
• Spark Plugs and Wires
  
• Harmonic Balancer
• Timing Cover
• Valve Covers
• Coil Packs
• Injectors
  

Notes:

• This engine requires a non-weighted flex plate/flywheel.
• Recommended fuel: 91 Octane.
• 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.
• Does NOT include engine controller. This is a dressed long block only. No Harness/ECU provided. This is for customers wishing to use their own engine controller package.
• BluePrint Engines Recommends Air Intake Kit BPPLS01013.