Product Description
The ATK HP36 Chevrolet 383ci High-Performance Stroker Base Crate Engine is a powerful, professionally assembled small-block V8 designed for classic Chevrolet restorations, muscle-car projects, performance automotive applications, and custom vehicle builds.
Producing an impressive 435 horsepower and 475 lb-ft of torque, this performance engine combines traditional Chevrolet small-block architecture with increased stroker displacement, high-performance aluminum cylinder heads, forged pistons, and a hydraulic roller camshaft.
The 383 cubic-inch stroker configuration features a 4.040-inch bore and 3.750-inch stroke, providing increased displacement compared with a conventional Chevrolet 350ci engine.
This increased displacement contributes to the engine’s strong torque characteristics, making it an attractive foundation for compatible performance vehicles and restoration projects.
Built around a 1996–2000 Chevrolet OE roller block, the ATK HP36 features four-bolt main construction and a one-piece rear main seal.
Its rotating assembly incorporates a SCAT nodular iron crankshaft, 5.7-inch SCAT I-beam connecting rods with ARP 8740 bolts, forged pistons, and moly piston rings.
The engine’s 10.0:1 compression ratio is paired with a hydraulic roller camshaft featuring 220° intake and 224° exhaust duration at .050-inch lift.
The performance aluminum cylinder heads feature 72cc combustion chambers, 180cc intake runners, 2.020-inch intake valves, and 1.600-inch exhaust valves.
Billet aluminum roller rocker arms with a 1.6:1 ratio complete the performance-oriented valvetrain.
Unlike the fully dressed ATK HP36C or mid-dressed HP36M, the HP36 is supplied as a Stage 1 base engine. This configuration provides the assembled engine foundation while allowing professional automotive builders to select compatible intake, fuel-delivery, ignition, cooling, and supporting components.
The base engine includes the short-block assembly, cylinder heads, camshaft, timing components, valve covers, timing cover, oil pan, oil pump, and a flexplate as specified in the published package.
The ATK HP36 383 Stroker Base Engine offers a combination of high-performance output, proven Chevrolet architecture, and assembled-engine convenience for customers seeking a powerful V8 foundation for compatible automotive projects.
Key Features
435 Horsepower Output
Delivers an advertised 435HP for compatible Chevrolet small-block performance applications.
475 lb-ft of Torque
Produces 475 lb-ft of torque, providing substantial naturally aspirated engine output.
383ci Stroker Displacement
Features a 4.040-inch bore and 3.750-inch stroke for increased displacement compared with a standard 350ci small block.
Four-Bolt Main Chevrolet Block
Built around a seasoned OE roller block with four-bolt main construction and a one-piece rear main seal.
SCAT Nodular Iron Crankshaft
Uses a SCAT performance crankshaft as part of the 383ci stroker rotating assembly.
Forged Pistons
Equipped with forged pistons and moly piston rings for the engine’s performance configuration.
SCAT I-Beam Connecting Rods
Features 5.7-inch SCAT I-beam connecting rods secured with ARP 8740 bolts.
Hydraulic Roller Camshaft
Includes a performance hydraulic roller camshaft with .528-inch intake lift and .536-inch exhaust lift.
Performance Aluminum Cylinder Heads
Uses aluminum cylinder heads with 72cc combustion chambers and 180cc intake runners.
Billet Aluminum Roller Rockers
Features 1.6-ratio billet aluminum roller rocker arms.
Stage 1 Base Engine Package
Provides an assembled performance long block without requiring the purchase of a fully dressed engine configuration.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | ATK High Performance |
| Model | HP36 |
| Engine Category | Stage 1 Base Crate Engine |
| Engine Family | Chevrolet Small Block V8 |
| Store SKU | ATK-HP36-383V8-2208 |
| Displacement | 383ci / 6.3L |
| Cylinder Configuration | V8 |
| Advertised Horsepower | 435 HP |
| Advertised Torque | 475 lb-ft |
| Engine Block | 1996–2000 OE Roller Block |
| Main Configuration | 4-Bolt Main |
| Rear Main Seal | One-Piece |
| Bore | 4.040 Inches |
| Stroke | 3.750 Inches |
| Compression Ratio | 10.0:1 |
| Crankshaft | SCAT Nodular Iron |
| Front Crankshaft Balance | Internal |
| Rear Crankshaft Balance | External |
| Connecting Rods | SCAT I-Beam, 5.7 Inches |
| Rod Bolts | ARP 8740 |
| Pistons | Forged |
| Piston Rings | Moly |
| Camshaft Type | Hydraulic Roller |
| Intake Duration @ .050 | 220° |
| Exhaust Duration @ .050 | 224° |
| Intake Valve Lift | .528 Inches |
| Exhaust Valve Lift | .536 Inches |
| Lobe Separation Angle | 110° |
| Timing Chain | Double Roller |
| Cylinder Heads | Performance Aluminum |
| Combustion Chamber Volume | 72cc |
| Intake Runner Volume | 180cc |
| Intake Valve Diameter | 2.020 Inches |
| Exhaust Valve Diameter | 1.600 Inches |
| Rocker Arms | Billet Aluminum Roller |
| Rocker Ratio | 1.6:1 |
| Oil Pan | Rear Sump |
| Oil Pan Capacity | 5 Quarts |
| Oil Pump | Melling Standard Volume |
| Recommended Fuel | 91+ Octane |
| Condition | Professionally Remanufactured |
Engine Block / Internal Configuration
| Component | Details |
|---|---|
| Engine Architecture | Chevrolet Small Block V8 |
| Engine Displacement | 383 Cubic Inches |
| Engine Block | Seasoned OE Roller Block |
| Block Years | 1996–2000 |
| Main Bearings | 4-Bolt Main |
| Rear Main Seal | One-Piece |
| Bore × Stroke | 4.040″ × 3.750″ |
| Crankshaft | SCAT Nodular Iron |
| Connecting Rods | SCAT 5.7″ I-Beam |
| Rod Fasteners | ARP 8740 |
| Pistons | Forged |
| Compression Ratio | 10.0:1 |
| Piston Rings | Moly |
| Timing Assembly | Double-Roller Timing Chain |
Cylinder Head / Valvetrain Configuration
| Component | Details |
|---|---|
| Cylinder Head Material | Aluminum |
| Combustion Chamber | 72cc |
| Intake Runner | 180cc |
| Intake Valve Size | 2.020 Inches |
| Exhaust Valve Size | 1.600 Inches |
| Camshaft Type | Hydraulic Roller |
| Intake Duration @ .050 | 220° |
| Exhaust 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 aluminum cylinder heads and hydraulic roller valvetrain form an important part of the engine’s advertised high-performance configuration.
Fuel / Intake Configuration
| Component | Details |
|---|---|
| Engine Fuel | Gasoline |
| Recommended Fuel | Premium 91+ Octane |
| Intake Manifold | Not Included |
| Carburetor | Not Included |
| Fuel Pump | Not Included |
| Recommended Intake | Edelbrock Performer RPM Dual Plane 7101 |
| Recommended Carburetor | Quick Fuel HR-680 |
| Recommended Fuel Pump | Holley Mechanical 110 GPH |
| Engine Configuration | Base Engine / Long Block |
The intake manifold, carburetor, and fuel-delivery equipment are selected separately for the intended vehicle configuration.
Ignition / Electrical Configuration
| Component | Details |
|---|---|
| Ignition System | Application-Specific |
| Distributor | Not Included |
| Recommended Distributor | Compatible HEI with Iron Gear |
| Recommended Spark Plugs | Autolite 3923 |
| Spark Plug Wires | Not Included |
| Recommended Wire Size | 8mm |
| Engine Computer | Not Included |
| Wiring Harness | Not Included |
Cooling / Lubrication Configuration
| Component | Details |
|---|---|
| Oil Pump | Melling Standard Volume |
| Oil Pan | Rear Sump |
| Oil Capacity | 5 Quarts |
| Timing Cover | Included |
| Valve Covers | Included |
| Water Pump | Not Included |
| Recommended Water Pump | Compatible OE Long Water Pump |
| Oil Recommendation | Conventional 10W-30, per Engine Documentation |
| Oil Filter | Compatible Wix or K&N |
Engine Balance / Drivetrain Configuration
| Component | Details |
|---|---|
| Crankshaft Front Balance | Internal |
| Crankshaft Rear Balance | External |
| Recommended Harmonic Balancer | PowerBond PB1046-N |
| Flexplate Specification | Externally Balanced |
| Referenced Flexplate | Pioneer FRA-159 |
| Rear Main Seal | One-Piece |
| Transmission Compatibility | Application-Specific |
| Drivetrain Requirements | Must Match Engine Balance Configuration |
Base Engine / Package Configuration
| Component | Details |
|---|---|
| Engine Configuration | Stage 1 Base |
| Assembled Short Block | Included |
| Hydraulic Roller Camshaft | Included |
| Timing Set | Included |
| Aluminum Cylinder Heads | Installed |
| Valve Covers | Included |
| Timing Cover | Included |
| Oil Pan | Included |
| Oil Pump | Included |
| Flexplate | Listed in Base Package |
| Intake Manifold | Not Included |
| Carburetor | Not Included |
| Distributor | Not Included |
| Water Pump | Not Included |
| Harmonic Balancer | Not Included |
What’s Included
| Included Component | Details |
|---|---|
| ATK HP36 Chevrolet 383ci Base Engine | 1 Unit |
| Four-Bolt Main Engine Block | Included |
| SCAT Nodular Iron Crankshaft | Installed |
| SCAT Connecting Rods | Installed |
| Forged Pistons | Installed |
| Moly Piston Rings | Installed |
| Hydraulic Roller Camshaft | Installed |
| Double-Roller Timing Chain | Installed |
| Aluminum Cylinder Heads | Installed |
| Roller Rocker Arms | Installed |
| Valve Covers | Included |
| Timing Cover | Included |
| Rear-Sump Oil Pan | Included |
| Oil Pump | Included |
| Flexplate | Listed in Supplier Package |
| Intake Manifold | Not Included |
| Carburetor | Not Included |
| Distributor | Not Included |
| Water Pump | Not Included |
| Harmonic Balancer | Not Included |
| Spark Plug Wires | Not Included |
| Transmission | Not Included |
Vehicle / Installation Compatibility
The ATK HP36 383ci Stroker Engine is intended for compatible Chevrolet small-block automotive applications.
| Vehicle Application | Compatibility Considerations |
|---|---|
| Classic Chevrolet Camaro | Engine Mounting and Drivetrain |
| Chevrolet Chevelle | Oil Pan and Steering Clearance |
| Chevrolet Nova | Chassis and Engine Bay Fitment |
| Chevrolet Impala | Engine and Transmission Compatibility |
| Chevrolet El Camino | Application-Specific Mounting |
| Classic Chevrolet Trucks | Engine Mounting and Cooling |
| GMC Trucks | Chevrolet Small-Block Compatibility |
| Custom Automotive Projects | Complete Installation Verification |
The rear-sump oil pan may not fit certain Chevelle applications, some Corvettes, or 1962–1967 Chevy II vehicles without appropriate changes.
Ideal Applications
Classic Chevrolet Restoration: Suitable for compatible restoration projects requiring a high-performance 383ci stroker V8.
Muscle-Car Projects: A performance-oriented engine foundation for appropriately configured classic Chevrolet vehicles.
Custom Automotive Builds: Allows builders to select compatible fuel, ignition, intake, and cooling components.
Classic Truck Projects: Suitable for compatible Chevrolet and GMC truck restoration projects.
Professional Automotive Workshops: Useful for engine replacement and performance restoration work performed by qualified technicians.
Product Advantages
The ATK HP36 383 Stroker Base Engine combines increased displacement with forged pistons, SCAT rotating components, performance aluminum cylinder heads, and a hydraulic roller camshaft.
Its advertised 435HP and 475 lb-ft of torque distinguish it from many conventional Chevrolet 350ci replacement engines.
The Stage 1 base configuration also allows customers to select external engine components appropriate to their specific vehicle and drivetrain.
Safety & Installation Notice
Professional automotive installation is recommended.
Vehicle compatibility, drivetrain configuration, cooling, fuel-delivery requirements, emissions regulations, and engine mounting must be verified before purchase.
This performance engine is not automatically emissions-legal for pollution-controlled street vehicles.
Warranty Information
Limited Manufacturer Warranty
Warranty duration, eligibility requirements, installation conditions, core-return procedures, and exclusions must follow the actual ATK and seller warranty documentation.
Product Highlights
ATK HP36 Chevrolet 383 Stroker Crate Engine 435 Horsepower 475 lb-ft Torque 383ci / 6.3L Small Block V8 Four-Bolt Main OE Roller Block SCAT Nodular Iron Crankshaft SCAT I-Beam Connecting Rods ARP 8740 Rod Bolts Forged Pistons 10.0:1 Compression Ratio Hydraulic Roller Camshaft Aluminum Performance Cylinder Heads Billet Aluminum Roller Rockers Double-Roller Timing Chain Stage 1 Base Engine Package
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