The BluePrint Engines GM LS Compatible 427 c.i. Engine and T56 Manual Transmission Package combines big-cubic-inch LS performance with the ultimate driver experience of a six-speed manual transmission. Designed for enthusiasts building high-performance street cars, Pro-Touring vehicles, and classic GM restomods, this Standard Edition Builder Series drivetrain delivers 585 horsepower and 520 lb-ft of torque with modern EFI control and proven LS architecture.

At the core of this package is a 427 c.i. LS-compatible engine featuring a high-strength LSX-style cast iron block, BluePrint aluminum LS3-style 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 complete ECU control, wiring harness integration, and BluePrint-calibrated tuning for reliable street performance.

Finished with a Black Pulley Kit, this engine package provides an aggressive underhood appearance while the included T56 six-speed manual transmission package delivers smooth shifting and highway-friendly cruising capability. This complete drivetrain combination is ideal for Camaro, Firebird, Corvette, Chevelle, Nova, and custom LS swap applications.

Key Features:

• Complete GM LS-compatible engine and T56 manual transmission package
• 427 cubic inch displacement
• 585 horsepower
• 520 lb-ft torque
• Standard Edition Builder Series
• Black Pulley Kit
• Holley Terminator X Max Gen IV EFI System
• BluePrint calibrated ECU and wiring harness
• High-strength LSX-style 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
• BluePrint cast aluminum intake manifold
• Drive-by-wire throttle body
• Fuel injectors and fuel rails
• Coil packs, sensors, spark plugs, and wires
• Harmonic balancer included
• Black front accessory drive:
  • LT1-style 150 amp alternator
  • LT1-style water pump
  • Type II power steering pump with reservoir
  • Compact A/C compressor
• Complete T56 six-speed transmission package:
  • McLeod Super Steel Pro dual-disc clutch
  • Steel bell housing
  • Billet flywheel
  • Engine guard
  • Starter
• T56 Gear Ratios:
  • 1st: 2.66:1
  • 2nd: 1.78:1
  • 3rd: 1.30:1
  • 4th: 1.00:1
  • 5th: 0.80:1
  • 6th: 0.63:1
• 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 LS performance builds

Installation Notes:

• Verify engine bay clearance, transmission tunnel clearance, and shifter placement 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 EFI system includes a BluePrint calibration. Do not follow standard Holley EFI manual calibration procedures for this engine package.
• BluePrint recommends air intake kit BPPLS01013 to maintain proper MAF calculations and dyno calibration.
• Retro-fit oil pan fits most 1955-1995 GM front-engine, rear-wheel-drive V8 applications.
• Engine/transmission package ships assembled.