ATK GM 496 Stroker 600 HP HP631PC Stage 3 Complete LB

Description

The pre-assembled carbureted intake system on the ATK GM 496 Stroker 600 HP HP631PC Stage 3 Complete LB eliminates complex aftermarket electronic tuning and wiring installation headaches. Command relentless low-end torque during competitive roll racing and street machine events. This complete engine utilizes high-flowing aluminum cylinder heads to secure reliable 600 HP performance instantly.

Key Features of ATK GM 496 Stroker 600 HP HP631PC

• High-Performance Aluminum Cylinder Heads: Feature advanced port designs to maximize airflow into the combustion chambers for 600 HP.
• Holley Carburetor & Dual-Plane Intake: Provide immediate air and fuel delivery for instant turn-key performance right out of the crate.
• Hydraulic Roller Camshaft: Reduces valvetrain friction and ensures aggressive throttle response without sacrificing street drivability.
• HEI Distributor & Spark Plug Wires: Deliver consistent high-voltage spark to prevent high-RPM misfires during track events.
• Stroker Engine Displacement (8.1L / 496 CID): Extends cylinder stroke to produce massive low-end torque required for rapid acceleration.
• Compression Ratio (10.1:1): Optimizes power output while remaining completely safe for premium 91 octane pump gas.
• Cast Iron Chevy Big Block Block: Establishes a highly rigid foundation to prevent structural flexing under extreme big block torque loads.

Component Breakdown: Turn-Key Complete Stage 3 Engine

This complete engine package arrives fully dressed from the intake manifold down to the oil pan to eliminate sourcing individual accessories.

• A high flow carburetor sits atop a matched aluminum intake manifold while the included distributor and spark plug wires ensure immediate ignition out of the crate.
• A factory style water pump and harmonic balancer complete the front drive assembly allowing builders to focus strictly on chassis installation.

Vehicle Fitment & Compatibility Matrix

Designed as a comprehensive powertrain solution this fully dressed engine drops effortlessly into iconic Chevrolet muscle cars. Sourcing one of our turn-key Chevy big block engines bypasses months of tedious machine shop delays.

• Fits 1970-1972 Chevrolet Chevelle models seeking a fully dressed big block powertrain swap.
• Fits 1968-1972 Chevrolet El Camino platforms requiring a turn key solution for aggressive street driving.
• Fits classic Chevrolet Corvette models looking for a highly dressed big block conversion.
• Fits 1973-1987 Chevrolet C10 pickup trucks acting as a complete drop-in powertrain upgrade.

Fuel & Ignition System Requirements

Since the induction and ignition systems are pre-installed builders simply need to provide clean fuel and adequate exhaust plumbing.

• The pre-installed carburetor requires a steady supply of 91 Octane premium pump gas fed by a high quality mechanical or electric fuel pump to maintain safe air fuel ratios.
• The included distributor mandates a full twelve volt ignition source bypassing any original factory resistor wires to guarantee a powerful spark.

Installation, Break-In Oil & Priming Instructions

Even fully dressed engines demand careful pre-lubrication and heat cycling to ensure long term mechanical reliability.

• Before firing the engine builders must utilize a specialized tool to prime the oiling system manually ensuring fluid reaches the upper valvetrain completely.
• Fill the engine with a premium high zinc break in oil and perform a careful initial startup monitoring for leaks before executing a 500 mile break in period.

USA Warranty, Emissions & Logistics

ATK provides exceptional manufacturer support ensuring this complete engine package delivers reliable performance for years.

• Backed by a strict 1-Year manufacturer warranty this complete long block offers extensive coverage against assembly defects when documented installation procedures are followed.
• This non-emissions compliant engine is designated for pre-emissions or off road Race Use Only and requires freight delivery to a commercial address with a forklift.