Product Description
The ATK HP89CPOL Chevrolet 350ci Complete Crate Engine is a professionally assembled high-performance small-block V8 designed for classic Chevrolet restorations, muscle-car projects, custom automotive builds, and performance engine replacement applications.
Delivering an impressive 390 horsepower and 420 lb-ft of torque, this complete crate engine combines proven Chevrolet small-block architecture with performance-oriented internal components, premium aluminum cylinder heads, and a distinctive polished exterior finish.
The HP89CPOL is built around a 1996–2000 Chevrolet OE roller block featuring four-bolt main construction and a one-piece rear main seal. Its traditional 350 cubic-inch displacement provides a familiar foundation for classic automotive applications while delivering significantly increased performance compared with many original factory configurations.
Inside the engine, a carefully matched combination of hypereutectic pistons, moly piston rings, a hydraulic roller camshaft, and a double-roller timing chain contributes to its strong performance characteristics.
The ATK high-performance aluminum cylinder heads feature 2.020-inch intake valves and 1.600-inch exhaust valves. These components work alongside billet aluminum roller rocker arms and the hydraulic roller camshaft to support efficient engine airflow.
A major advantage of this particular model is its polished aluminum appearance. Unlike the standard black-finished version, the HP89CPOL features polished Chevrolet-embossed aluminum valve covers and complementary components, creating a premium engine-bay presentation for restoration enthusiasts.
The complete engine configuration includes a Quick Fuel 680 CFM four-barrel carburetor, ATK dual-plane intake manifold, HEI distributor, Holley mechanical fuel pump, spark plugs, ignition wires, air cleaner, and additional engine-mounted components.
These included items make the HP89CPOL a convenient option for customers who prefer an assembled performance engine package rather than purchasing major engine components individually.
The ATK HP89CPOL Chevrolet 350 V8 Complete Engine offers a compelling combination of traditional American V8 performance, polished engine appearance, quality internal components, and comprehensive assembled-engine equipment for compatible classic Chevrolet projects.
Key Features
390 Horsepower Performance
Produces an advertised 390HP, providing substantial naturally aspirated performance for compatible Chevrolet small-block applications.
420 lb-ft of Torque
Delivers an advertised 420 lb-ft of torque, supporting strong performance across the engine’s intended operating range.
Chevrolet 350ci Small Block V8
Features the proven Chevrolet 350 cubic-inch architecture widely used in classic automotive restoration and performance applications.
Premium Polished Finish
Includes polished Chevrolet-embossed aluminum valve covers and complementary engine components for a distinctive appearance.
High-Performance Aluminum Cylinder Heads
Features ATK aluminum cylinder heads with performance-oriented intake and exhaust valves.
Hydraulic Roller Camshaft
Uses a hydraulic roller camshaft designed to support the engine’s advertised horsepower and torque.
10.0:1 Compression Ratio
Equipped with hypereutectic pistons and a 10.0:1 compression ratio.
Quick Fuel 680 CFM Carburetor
Includes a four-barrel carburetor with vacuum secondaries and an electric choke.
ATK Dual-Plane Intake Manifold
Designed to work with the carbureted fuel system and performance-oriented engine configuration.
Complete Engine Package
Supplied with major fuel, intake, ignition, cooling, and engine-mounted components.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | ATK High Performance |
| Model | HP89CPOL |
| Engine Category | Complete Performance Crate Engine |
| Engine Family | Chevrolet Small Block V8 |
| SKU | ATK-HP89CPOL-350V8-1866 |
| Displacement | 350ci / 5.7L |
| Cylinder Configuration | V8 |
| Advertised Horsepower | 390 HP |
| Advertised Torque | 420 lb-ft |
| Engine Block | 1996–2000 OE Roller Block |
| Main Bearing Configuration | 4-Bolt Main |
| Rear Main Seal | One-Piece |
| Bore | 4.040 Inches |
| Stroke | 3.480 Inches |
| Compression Ratio | 10.0:1 |
| Crankshaft | OE Reground |
| Crankshaft Balance | Internal Front / External Rear |
| Connecting Rods | OE Powder Metal, 5.700 Inches |
| Pistons | Hypereutectic |
| Piston Rings | Moly |
| Camshaft Type | Hydraulic Roller |
| Cam Duration @ .050 | 220° Intake / 224° Exhaust |
| Intake Valve Lift | .528 Inches |
| Exhaust Valve Lift | .536 Inches |
| Lobe Separation Angle | 110° |
| Timing Chain | Double Roller |
| Cylinder Heads | ATK High-Performance Aluminum |
| Intake Valve Size | 2.020 Inches |
| Exhaust Valve Size | 1.600 Inches |
| Rocker Arms | Billet Aluminum Roller |
| Rocker Ratio | 1.6:1 |
| Carburetor | Quick Fuel 680 CFM |
| Intake Manifold | ATK Dual Plane |
| Distributor | Black HEI |
| Fuel Pump | Holley Mechanical |
| Oil Pump | Melling Standard Volume |
| Oil Pan | Rear Sump, 5 Quart |
| Water Pump | OE Long Water Pump |
| Recommended Fuel | 91+ Octane |
| Engine Finish | Polished |
| Manufacturer Part Number | HP89CPOL |
Engine Block / Internal Configuration
| Component | Details |
|---|---|
| Engine Architecture | Chevrolet Small Block V8 |
| Engine Displacement | 350ci |
| Engine Block | Four-Bolt Main OE Roller Block |
| Block Years | 1996–2000 |
| Rear Main Seal | One-Piece |
| Bore × Stroke | 4.040″ × 3.480″ |
| Crankshaft | OE Reground |
| Connecting Rods | OE Powder Metal, 5.700″ |
| Pistons | Hypereutectic |
| Compression Ratio | 10.0:1 |
| Piston Rings | Moly |
| Timing Assembly | Double-Roller Timing Chain |
Cylinder Head / Valvetrain Configuration
| Component | Details |
|---|---|
| Cylinder Head Manufacturer | ATK High Performance |
| Cylinder Head Material | Aluminum |
| Intake Valve Diameter | 2.020 Inches |
| Exhaust Valve Diameter | 1.600 Inches |
| Camshaft Type | Hydraulic Roller |
| Intake Cam Duration @ .050 | 220° |
| Exhaust Cam Duration @ .050 | 224° |
| Intake Valve Lift | .528 Inches |
| Exhaust Valve Lift | .536 Inches |
| Lobe Separation | 110° |
| Rocker Arms | Billet Aluminum Roller |
| Rocker Ratio | 1.6:1 |
The hydraulic roller camshaft, aluminum cylinder heads, and roller rocker configuration work together to support the engine’s advertised performance output.
Fuel / Intake Configuration
| Component | Details |
|---|---|
| Fuel System | Carbureted |
| Carburetor Brand | Quick Fuel |
| Carburetor Model | HR-680 |
| Carburetor Capacity | 680 CFM |
| Carburetor Type | Four-Barrel |
| Secondary Operation | Vacuum Secondary |
| Choke | Electric |
| Intake Manifold | ATK Dual Plane |
| Fuel Pump | Holley Mechanical |
| Fuel Pump Model | 12-327-11 |
| Fuel Pump Capacity | 110 GPH |
| Fuel Line | Dual-Inlet Stainless AN Hose |
| Air Cleaner | 14″ × 3″ Super Flow |
| Air Filter | Washable |
Ignition / Electrical Configuration
| Component | Details |
|---|---|
| Ignition System | HEI |
| Distributor | Black HEI |
| Distributor Gear | Iron |
| Spark Plugs | Autolite 3923 |
| Spark Plug Wires | 8 mm |
| Engine Management | Carbureted Ignition Configuration |
| Computer Included | No |
| Wiring Harness Included | No |
Cooling / Lubrication Configuration
| Component | Details |
|---|---|
| Water Pump | OE Long Water Pump |
| Thermostat Housing | Chrome |
| Thermostat | 180°F |
| Oil Pump | Melling Standard Volume |
| Oil Pan | Rear Sump |
| Oil Capacity | 5 Quarts |
| Recommended Engine Oil | Conventional 10W-30, according to ATK guidance |
| Oil Filter | Compatible Wix or K&N |
| Harmonic Balancer | PowerBond PB1046-N |
Engine Balance / Drivetrain Configuration
| Component | Details |
|---|---|
| Crankshaft Balance | Internal Front / External Rear |
| Harmonic Balancer | Internally Balanced |
| Required Flexplate Configuration | Externally Balanced |
| Referenced Flexplate | Pioneer FRA-159 |
| Rear Main Seal | One-Piece |
| Transmission Compatibility | Application-Specific |
| Vehicle Installation | Requires Fitment Verification |
Polished Finish Configuration
| Component | Details |
|---|---|
| Finish Package | Polished |
| Valve Covers | Billet Specialties Cast Aluminum |
| Valve Cover Appearance | Polished Chevrolet-Embossed |
| PCV Valve | Matching |
| Breather | Push-In |
| Thermostat Housing | Chrome |
| Air Cleaner | 14″ × 3″ Super Flow |
| Appearance | Premium Polished Performance Engine |
The HP89CPOL provides the performance of the ATK 350ci V8 with a polished appearance particularly suited to classic vehicle restoration projects.
What’s Included
| Included Component | Details |
|---|---|
| ATK HP89CPOL Complete Crate Engine | 1 Unit |
| Chevrolet 350ci Engine Assembly | Included |
| Four-Bolt Main Engine Block | Included |
| Aluminum Cylinder Heads | Installed |
| Hydraulic Roller Camshaft | Installed |
| Roller Rocker Arms | Installed |
| ATK Dual-Plane Intake Manifold | Included |
| Quick Fuel 680 CFM Carburetor | Included |
| Holley Mechanical Fuel Pump | Included |
| Black HEI Distributor | Included |
| Spark Plugs | Included |
| Spark Plug Wires | Included |
| Polished Chevrolet Valve Covers | Included |
| Matching PCV Valve & Breather | Included |
| Super Flow Air Cleaner | Included |
| Oil Pan & Oil Pump | Included |
| Water Pump | Listed in Engine Configuration |
| Thermostat Housing | Included |
| Harmonic Balancer | Listed in Engine Configuration |
| Flywheel / Flexplate | Confirm Supplied Package |
Vehicle / Installation Compatibility
The ATK HP89CPOL Chevrolet 350ci V8 is designed for compatible Chevrolet small-block automotive applications.
| Application | Compatibility Considerations |
|---|---|
| Classic Chevrolet Cars | Engine Mounting and Transmission Compatibility |
| Chevrolet Muscle Cars | Engine Bay, Drivetrain and Cooling Requirements |
| Classic Chevrolet Trucks | Mounting, Exhaust and Oil Pan Clearance |
| Custom Automotive Builds | Small-Block Chevrolet Configuration |
| Restoration Projects | Application-Specific Fitment |
| Performance Projects | Supporting Drivetrain and Mechanical Requirements |
Important: The rear-sump oil pan is not suitable for certain Chevrolet configurations, including some Chevelles, Corvettes, and 1962–1967 Chevy II vehicles.
Ideal Applications
Classic Chevrolet Restorations: An excellent choice for compatible Chevrolet restoration projects requiring a performance-oriented 350ci small-block engine.
Muscle-Car Projects: Suitable for classic American performance vehicles with appropriate engine mounting, drivetrain, and cooling configurations.
Custom Automotive Builds: Provides a professionally assembled V8 engine package for carefully planned projects.
Classic Chevrolet Trucks: Useful for compatible truck applications when mounting and drivetrain requirements are satisfied.
Professional Automotive Workshops: Suitable for engine replacement and restoration projects managed by qualified automotive technicians.
Product Advantages
The ATK HP89CPOL combines 390HP, 420 lb-ft of torque, aluminum performance cylinder heads, hydraulic roller valvetrain components, and a polished engine finish in one complete crate-engine package.
Its traditional Chevrolet architecture and included engine-mounted components make it a convenient option for suitable classic vehicle projects.
The polished valve covers and complementary hardware also distinguish the HP89CPOL from the standard ATK HP89C and black-finished HP89CBLK configurations.
Safety & Installation Notice
Professional automotive installation is recommended. Vehicle compatibility, engine mounts, oil pan clearance, cooling requirements, exhaust configuration, transmission matching, and emissions regulations should be verified before purchase.
This performance engine is not intended for use in pollution-controlled vehicles unless the installation complies with all applicable requirements.
Warranty Information
2-Year Limited Manufacturer Warranty
Warranty coverage, eligibility requirements, exclusions, and claim procedures depend on ATK’s official manufacturer warranty terms. Any additional retailer coverage must be documented separately.
Product Highlights
ATK HP89CPOL Complete Crate Engine Chevrolet 350ci Small Block V8 390 Horsepower 420 lb-ft Advertised Torque 10.0:1 Compression Ratio High-Performance Aluminum Cylinder Heads Hydraulic Roller Camshaft Billet Aluminum Roller Rocker Arms Quick Fuel 680 CFM Carburetor ATK Dual-Plane Intake Manifold Polished Chevrolet-Embossed Valve Covers Complete Performance Engine Package 2-Year Limited Manufacturer Warranty
Reviews
There are no reviews yet.