ATK GM 383 Stroker 500 HP HP55C Stage 3 Carbureted LB

Description

Inadequate small block power limits require the ATK GM 383 Stroker 500 HP HP55C Stage 3 Carbureted LB and its high-flowing aluminum head design. Experience brutal off-the-line acceleration and instant throttle response. This build utilizes an aggressive hydraulic roller camshaft to deliver five hundred horsepower reliably.

Key Features of ATK GM 383 Stroker 500 HP HP55C

• Seasoned 4-Bolt Main GM Block: Provides extreme structural rigidity to secure the rotating assembly during high-load drag strip launches.
• Aluminum Cylinder Heads (72cc Chambers / 195cc Runners): Maximizes airflow velocity through 2.02-inch intake valves to generate massive high-RPM horsepower.
• Scat 4340 Forged Steel Crankshaft: Absorbs severe torsional stresses to eliminate crankshaft flexing under high mechanical load.
• Scat 4340 Forged H-Beam Connecting Rods: Eliminates rod flexing and failure risks during aggressive high-RPM track runs.
• Forged Flat-Top Pistons (10.3:1 Compression): Elevates thermal resistance while optimizing combustion efficiency for high-octane premium pump gas.
• Aggressive Hydraulic Roller Camshaft (.536″/.544″ Lift): Extends valve duration to produce an aggressive muscle car idle and unmatched mid-range pull.
• High-Flow 750 CFM Carburetor: Provides precise air and fuel metering for instant turn-key performance out of the crate.
• Long-Style Water Pump: Ensures compatibility with standard factory accessory drive brackets for classic Chevrolet chassis.

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 fully dressed Chevy small blocks bypasses months of tedious machine shop delays.

• Fits 1967-1981 Chevrolet Camaro models seeking a fully dressed powertrain swap.
• Fits 1973-1987 Chevrolet C10 pickup trucks requiring a reliable and modern carbureted setup.
• Fits 1964-1972 Chevrolet Chevelle applications needing a reliable V8 foundation.
• Fits 1968-1974 Chevrolet Nova conversions requiring a 383 drop-in setup.

Fuel & Ignition System Requirements (Tech Notes)

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 (Tech Notes)

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.