BluePrint Builder Series LS427/605HP Standard Edition EFI Crate Engine and 4L65/70E Trans Combos

The BluePrint Builder Series LS427/605 hp Standard Edition EFI crate engine and 4L65/70E trans combo is a complete, ready-to-install engine and automatic transmission package for classic cars and hot rods. It features a powerful 427 cu. in. GM LS-style engine making around 605 hp with EFI—paired with a robust 4L65/70E automatic transmission, electronic controller, torque converter, and accessories for a simplified drivetrain swap. This kit takes the guesswork out of matching components, offering a high performance, dyno-tested solution with forged internals, aluminum heads, and modern fuel injection.

* Engine details (LS427/605 hp):
-- Displacement: 427 cu. in. (7.0L)
-- Horsepower/Torque: Around 605 hp / 565 lbs.-ft.
-- Block: BluePrint's high-strength cast iron LS-style block with enhanced strength
-- Rotating assembly: Forged crankshaft, forged connecting rods, forged pistons for durability
-- Cylinder heads: BluePrint aluminum heads with large intake/exhaust runners
-- Camshaft: Hydraulic roller cam
-- Fuel system: Complete electronic fuel injection (EFI) system, often with Holley's Terminator X
-- Compression ratio: 11:1

* Transmission details (4L65/70E):
-- Type: Heavy-duty automatic transmission (4L65E or 4L70E)
-- Controller: Includes an electronic transmission controller for proper shifting
-- Torque converter: Comes with a matching torque converter (around 2,200-2,400 rpm stall)
-- Flexplate: Non-weighted flexplate installed

* Package benefits:
-- Complete drivetrain: Comes fully assembled and bolted together
-- Simplified installation: Designed as a plug-and-play solution for swaps
-- Dyno tested: Engine performance is verified on a dyno, with results provided
-- Includes accessories: Often includes front accessories (alternator, power steering pump) and a swap-ready oil pan
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