ATK HP107C Chevrolet 383ci High-Performance Stroker V8 Complete Crate Engine – 525HP & 515 lb-ft Torque

Product Description

The ATK HP107C Chevrolet 383ci High-Performance Stroker Complete Crate Engine is a professionally assembled, high-output small-block V8 engineered for compatible Chevrolet muscle-car restorations, custom automotive projects, and professionally developed performance drivetrain applications.

Delivering an impressive 525 horsepower and 515 lb-ft of torque, this complete performance engine combines increased 383 cubic-inch displacement with a forged SCAT rotating assembly, performance aluminum cylinder heads, hydraulic roller camshaft, and carefully selected external engine components.

Built around a seasoned 1996–2000 Chevrolet OE roller block, the HP107C features four-bolt main construction and a one-piece rear main seal. The block’s 4.040-inch bore and 3.750-inch stroke create the 383ci stroker configuration.

The engine incorporates a SCAT 4340 forged steel crankshaft, SCAT forged H-beam connecting rods, forged pistons, and moly piston rings.

These components distinguish the HP107C from conventional Chevrolet small-block replacement engines and provide the foundation for its advertised performance capability.

A major highlight of this engine is its performance-oriented valvetrain. The hydraulic roller camshaft features 246° intake duration and 250° exhaust duration at .050-inch lift, with .603-inch intake lift and .609-inch exhaust lift.

The engine also features performance aluminum cylinder heads, roller rocker arms, and a double-roller timing chain.

The ATK HP107C is supplied in a complete-engine configuration, incorporating a Quick Fuel 750 CFM carburetor, Holley Strip Dominator single-plane intake manifold, performance distributor, mechanical fuel pump, water pump, harmonic balancer, spark plugs, and spark plug wires.

This comprehensive configuration separates the HP107C from the HP107 base-engine package by providing major external engine components together with the assembled long block.

Its Moroso seven-quart rear-sump oil pan with windage tray provides a performance-oriented lubrication arrangement, complemented by a Melling oil pump.

The HP107C is especially relevant to Chevrolet enthusiasts seeking a complete 383 stroker engine for a compatible classic muscle car, restored performance vehicle, or specialized custom automotive project.

Although described as a complete engine, the assembly still requires vehicle-specific installation components and professional compatibility verification.

For buyers seeking an assembled Chevrolet small-block performance engine with forged internals, premium induction components, and substantial advertised output, the ATK HP107C 525HP Complete Crate Engine represents a comprehensive package.

The manufacturer’s published engine presentation confirms the HP107C’s 525HP output, 515 lb-ft torque, forged rotating assembly, and major engine components.

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Key Features

525 Horsepower Output

Delivers an advertised 525HP from its naturally aspirated Chevrolet 383ci stroker V8 configuration.

515 lb-ft of Torque

Produces 515 lb-ft of torque, supporting the engine’s high-output performance characteristics.

Chevrolet 383ci Stroker Architecture

Combines a traditional Chevrolet small-block V8 layout with increased displacement.

Four-Bolt Main Engine Block

Uses a seasoned OE roller block with four-bolt main construction and a one-piece rear main seal.

SCAT 4340 Forged Steel Crankshaft

Features a high-strength forged crankshaft as part of the performance rotating assembly.

Forged H-Beam Connecting Rods

Equipped with SCAT 4340 forged H-beam connecting rods and ARP 8740 bolts.

Forged Performance Pistons

Uses forged pistons and moly piston rings.

Hydraulic Roller Camshaft

Features a performance hydraulic roller camshaft with .603-inch intake lift and .609-inch exhaust lift.

Performance Aluminum Cylinder Heads

Includes aluminum cylinder heads matched to the engine’s high-output configuration.

Quick Fuel 750 CFM Carburetor

The complete-engine package includes a Quick Fuel carburetor with mechanical secondaries and no choke.

Holley Strip Dominator Intake

Features a single-plane performance intake manifold.

Seven-Quart Moroso Oil Pan

Includes a performance rear-sump oil pan with integrated windage tray.

Complete Engine Package

Provides the assembled engine with major intake, fuel, ignition, and cooling components.

Technical Specifications

Specification note: ATK’s published build presentation and Speedway Motors list 10.2:1 compression with Dart 200cc cylinder heads, while JEGS lists 10.0:1 compression with ATK Pro-Filer 210cc heads. Confirm the engine-specific build sheet before publishing one exact cylinder-head or compression specification.

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Engine Block / Internal Configuration

The forged rotating assembly forms the foundation of the HP107C’s high-performance configuration.

Cylinder Head / Valvetrain Configuration

Fuel / Intake Configuration

Ignition / Electrical Configuration

Cooling / Lubrication Configuration

Engine Balance / Drivetrain Configuration

Complete Engine / Package Configuration

What’s Included

The manufacturer presentation identifies the complete-engine components, and JEGS lists a flexplate among included parts. Other sellers list the flexplate as excluded, so the physical package should be verified.

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Vehicle / Installation Compatibility

The ATK HP107C 383 Stroker Complete Engine is intended for professionally evaluated Chevrolet small-block applications.

Vehicle year or engine family alone does not guarantee fitment.

Ideal Applications

Classic Chevrolet Restoration

Suitable for professionally planned Chevrolet projects requiring a high-output carbureted small-block V8.

Muscle-Car Performance Builds

Provides a complete 383ci performance engine for compatible muscle-car projects with appropriately matched drivetrain components.

Custom Automotive Projects

Offers builders an assembled engine with major external components already selected.

Professional Engine Replacement

A performance-oriented option for workshops specializing in custom drivetrain and restoration work.

Classic Chevrolet & GMC Trucks

May be suitable for selected classic truck projects after confirming mounting, cooling, clearance, and drivetrain requirements.

Product Advantages

The ATK HP107C combines a forged SCAT rotating assembly, 383ci stroker displacement, aluminum cylinder heads, hydraulic roller camshaft, and complete carbureted engine configuration.

Its advertised 525HP and 515 lb-ft torque output make it a higher-output alternative to conventional Chevrolet small-block replacement engines.

Compared with the ATK HP107 base engine, the HP107C incorporates major external fuel, ignition, intake, and cooling components.

The package is intended for customers seeking a comprehensive engine assembly rather than a bare long block.

Safety & Installation Notice

Professional automotive installation is required for evaluating drivetrain compatibility, cooling capacity, vehicle braking systems, emissions requirements, and engine mounting.

ATK and major suppliers specifically warn that this engine configuration is not suitable for vehicles retaining conventional vacuum-assisted power brakes or air conditioning without an appropriate professionally engineered solution.

The HP107C is not represented as emissions-compliant for pollution-controlled vehicles.

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Warranty Information

2-Year Limited Manufacturer Warranty

The ATK HP107C is advertised with a two-year limited warranty. Eligibility, labor coverage, installation requirements, exclusions, and claim procedures depend on ATK’s written terms.

Core deposits and freight conditions may be charged separately by individual sellers.

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Product Highlights

• ATK HP107C Chevrolet 383 Stroker Complete Crate Engine

• 525 Horsepower & 515 lb-ft Torque

• 383ci / 6.3L Small Block V8

• SCAT 4340 Forged Steel Crankshaft

• SCAT Forged H-Beam Connecting Rods

• Forged Pistons

• Four-Bolt Main OE Roller Block

• Performance Aluminum Cylinder Heads

• Hydraulic Roller Camshaft

• Billet Aluminum Roller Rocker Arms

• Quick Fuel 750 CFM Carburetor

• Holley Strip Dominator Intake

• Pro-Billet Distributor

• Holley Mechanical Fuel Pump

• Moroso 7-Quart Oil Pan

• PowerBond Performance Harmonic Balancer

• Complete Engine Configuration

• 2-Year Limited Manufacturer Warranty