Description
ATK High Performance GM 383 Stroker 415 HP Stage 3 Long Block Crate Engine – Chevy Small Block | HP94CBLK
Affordable Stroker Power for Classic Muscle Cars, Street Rods & Performance Builds.
The ATK High Performance GM 383 Stroker 415 HP Stage 3 Long Block Crate Engine (HP94CBLK) delivers big stroker power in a turn-key package, combining classic small block Chevy muscle with modern reliability. Producing 415 horsepower, this 6.3L/383 CID long block is designed for street performance enthusiasts looking for torque, throttle response, and drivability without breaking the bank.
Featuring ATK aluminum heads, hydraulic roller cam, and a fully dressed intake package, this engine is the ideal solution for classic muscle cars, hot rods, or light trucks that demand extra grunt. Hand-assembled using high-quality, remanufactured components, this engine is built to perform and backed by ATK’s industry reputation.
🔧 Specifications
| Feature | Specification |
|---|---|
| Brand | ATK High Performance Engines |
| Model Number | HP94CBLK |
| Engine Family | Chevy Small Block 383 Stroker |
| Displacement | 6.3L / 383 CID |
| Horsepower | 415 HP |
| Compression Ratio | 9.7:1 |
| Block Material | Cast Iron (Remanufactured) |
| Cylinder Heads | ATK High Performance Aluminum |
| Camshaft Type | Hydraulic Roller, OE Roller |
| Intake Manifold | Included (Carbureted Style) |
| Carburetor | Included |
| Distributor | Included |
| Oil Pan | Rear Sump (5 qt.) |
| Water Pump | Long-Style Included |
| Harmonic Balancer | Included |
| Valve Covers | Included (Black Finish) |
| Spark Plugs & Wires | Included |
| Air Cleaner | Included (Washable/Reusable Filter) |
| Engine Balance | Internal / External |
| Rear Main Seal | 1-Piece |
| Flexplate / Flywheel | Not Included |
| Remanufactured | Yes |
| Warranty | ATK Limited Warranty |
Key Features
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✅ 415 HP Stroker Power – Affordable performance for your classic ride
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✅ Hand-Assembled Long Block – Quality craftsmanship and balanced assembly
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✅ Aluminum Cylinder Heads (2.020″/1.600″) – Improved airflow for big power gains
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✅ Fully Dressed Intake Setup – Carburetor, distributor, and air cleaner included
-
✅ Hydraulic Roller Camshaft – Street-friendly power with excellent drivability
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✅ Black Valve Covers & Washable Air Cleaner – Stylish and practical
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✅ Remanufactured Cast Iron Block – Reliable, proven foundation for power builds
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✅ Ready to Run – Dyno-tested and ready for installation
What’s Included
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Intake Manifold (Carbureted)
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Carburetor
-
Distributor
-
Valve Covers (Black Finish with PCV & Breather)
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Timing Cover
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Oil Pan (Rear Sump, 5 qt.)
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Water Pump (Long-Style)
-
Harmonic Balancer
-
Spark Plugs & Wires
-
Air Cleaner Assembly (Reusable Filter)
⚠️ Fitment Note: Rear sump oil pan may not fit certain Chevelles with rear crossmember steering, some Corvettes, or 62-67 Chevy II models.
Ideal Applications
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Muscle Cars (Camaro, Chevelle, Nova)
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Hot Rods & Restomods
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Classic Trucks
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Street Rods
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Weekend Cruisers
Shipping & Warranty Information
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Ships within 5–7 business days
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Professionally packaged for secure transit
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Covered by ATK’s Limited Warranty
❓ Frequently Asked Questions (FAQs)
Q1: Is this engine dyno-tested?
Yes, ATK dyno-tests every Stage 3 engine to verify horsepower and performance.
Q2: What fuel is recommended?
Premium pump gas (91+ octane) is recommended for optimal performance.
Q3: Can this fit my older small block Chevy platform?
Yes, this is a standard SBC fitment. Verify clearance with your chassis for oil pan compatibility.
Q4: Does this engine come EFI-ready?
No, this engine is configured for carbureted applications.
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