Severe induction tuning bottlenecks require the ATK GM 383 Stroker 500HP HP55C Stage 3 Complete Engine and its fully dressed induction hardware. Command immediate throttle response during heavy street driving. This build utilizes a precision machined cast iron block to output five hundred horsepower effortlessly.

Key Features of ATK GM 383 Stroker 500HP HP55C

- Seasoned 4-Bolt Main Cast Iron Block: Secures the rotating assembly with maximum clamping force to prevent main cap walk under heavy load.
- Aluminum Cylinder Heads (72cc Chambers / 195cc Runners): Maximizes airflow capacity to feed the larger 383 displacement effortlessly.
- Scat 4340 Forged Steel 3.750″ Crankshaft: Extends cylinder stroke to produce massive low-end torque required for rapid acceleration.
- Forged Flat-Top Pistons (10.3:1 Compression): Maximizes the mechanical energy extracted from every combustion cycle on premium pump gas.
- Hydraulic Roller Camshaft (.536″/.544″ Lift): Reduces valvetrain friction and ensures aggressive throttle response without sacrificing street drivability.
- High-Flow 750 CFM Carburetor: Provides precise air and fuel metering for instant turn-key performance out of the crate.
- Dual-Plane Aluminum Intake Manifold: Promotes equal fuel distribution to prevent lean conditions in demanding street and strip environments.
- HEI Distributor & High-Voltage Coil: Delivers consistent spark energy to prevent high-RPM misfires across the power band.

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. Dropping in 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.