Build a powerful, reliable LS swap drivetrain with the BluePrint Engines GM LS Compatible 427 c.i. Engine and 4L65/70E Automatic Transmission Package. This Standard Edition Builder Series combination delivers 585 horsepower and 520 lb-ft of torque, pairing BluePrint’s high-strength 427 cubic inch LS-compatible engine with a performance-built 4L65/70E automatic transmission for a complete, ready-to-install package.

Designed for street performance, Pro-Touring, and restomod applications, this 427 LS platform features a reinforced LSX-style cast iron block, BluePrint aluminum cylinder heads, forged rotating assembly, hydraulic roller camshaft, and an 11:1 compression ratio. The included Holley Terminator X Max Gen IV EFI System provides modern fuel control, ECU management, and simplified tuning capability.

Finished with a Natural Pulley Kit, this package provides a clean OEM-inspired appearance while delivering modern LS swap performance. The included 4L65/70E automatic transmission package features electronic control, torque converter, flexplate, and starter for a complete drivetrain solution.

Key Features:

• Complete GM LS-compatible engine and automatic transmission package
• 427 cubic inch displacement
• 585 horsepower
• 520 lb-ft torque
• Natural pulley kit
• BluePrint Engines LSX-style high-strength cast iron block
• Increased deck thickness and strength webbing
• OEM LS3 front and rear cover compatibility
• Improved water jacket design
• Extended cylinder skirt
• Priority main oiling system
• Six-bolt main design
• One-piece rear main seal
• BluePrint aluminum LS3-style cylinder heads
• 11:1 compression ratio
• Forged rotating assembly:
  • Forged crankshaft
  • Forged pistons
  • Forged 6.125" connecting rods
• 4.125" stroke crankshaft
• Hydraulic roller camshaft:
  • .624" intake lift
  • .624" exhaust lift
  • 239° intake duration @ .050"
  • 255° exhaust duration @ .050"
  • 114 LSA
• Holley Terminator X Max Gen IV EFI System
• Complete ECU and wiring harness
• Integrated touchscreen handheld controller
• BluePrint calibrated EFI programming
• Cast aluminum intake manifold
• Drive-by-wire throttle body
• Fuel injectors and rails
• Coil packs, sensors, spark plugs, and wires
• Harmonic balancer included
• Natural front accessory drive:
  • LT1-style alternator
  • LT1-style water pump
  • Type II power steering pump
  • Compact A/C compressor
• Performance-built 4L65/70E automatic transmission
• Electronic transmission controller included
• 2200-2400 stall torque converter
• Flexplate included
• Starter included
• Recommended fuel: 91+ octane

Fitment Applications:

• 1982-2002 Chevrolet Camaro LS swap builds
• 1982-2002 Pontiac Firebird LS swap builds
• Chevrolet Corvette LS conversions
• Chevrolet Chevelle restomod builds
• Chevrolet Nova LS conversions
• GM Pro-Touring vehicles
• Classic muscle car LS swaps
• Street rods
• Custom performance builds

Installation Notes:

• Verify engine bay clearance, transmission tunnel clearance, accessory placement, and cooling requirements before installation.
• Additional swap components may be required depending on vehicle application:
  • Engine mounts
  • Transmission crossmember
  • Driveshaft modification
  • Cooling system upgrades
  • Fuel system upgrades
  • Exhaust modifications
  • Wiring integration
• Holley Terminator X ECU is calibrated by BluePrint Engines. Follow BluePrint calibration recommendations instead of standard Holley EFI setup procedures.
• Retro-fit oil pan fits many 1955-1995 GM front-engine rear-wheel-drive V8 applications.
• Engine/transmission package ships assembled.