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Blueprint Engines Gm 396 C.I.D. 491 Hp Stroker Base Long Block Crate Engines Bp3961Ct
$3.000
Blueprint Engines GM 396 C.I.D. Base Long Block Crate Engine, factory-rated at approximately 491 HP and 505 lb-ft of torque. Professionally assembled and dyno-tested for GM small block–based performance applications.
The Blueprint Engines BP3961CT is a GM 396 cubic-inch stroker base long block crate engine, precision-built and dyno-tested in the United States.
Engineered for performance and reliability, this model expands the proven GM small block platform with a stroker design that delivers a wide torque curve and consistent power output.
Each BP3961CT is assembled using all-new, high-quality components, with meticulous balancing and clearances checked during production. Every unit is factory dyno-tested to confirm oil pressure, compression, and approximate horsepower under standardized conditions.
The base long block configuration includes the short block assembly, camshaft, cylinder heads, and valvetrain — ideal for builders seeking a customizable foundation for a performance engine project.
Performance Overview:
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Factory-tested output around 491 horsepower and 505 lb-ft of torque
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Excellent mid-range torque and top-end response
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Suitable for street performance, classic muscle cars, and custom builds
Key Highlights:
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396 cubic-inch stroker based on GM small block design
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Fully assembled and tested long block configuration
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Built entirely from new components — no remanufactured parts
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Designed for power, durability, and long-term reliability
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Perfect starting point for high-performance builds requiring additional customization
Important Notes:
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Horsepower and torque are approximate factory test results and may vary based on intake, exhaust, and ignition setup.
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This engine is sold as a base long block — additional components such as carburetion, fuel system, ignition, and accessories are not included.
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Professional installation and tuning are recommended.
About Blueprint Engines:
Blueprint Engines is a U.S.-based manufacturer specializing in precision-built crate engines. Each unit is assembled from all-new components, dyno-tested, and verified for quality and reliability. The company’s commitment to accuracy and craftsmanship has made it a trusted name among engine builders and performance enthusiasts.
Key Technical Specifications
| Specification | Details |
|---|---|
| Brand | Blueprint Engines |
| Model Number | BP3961CT |
| Engine Type | GM Small Block Stroker |
| Configuration | Base Long Block Crate Engine |
| Displacement | 396 Cubic Inches (C.I.D.) |
| Horsepower (Factory Tested) | Approx. 491 HP |
| Torque (Factory Tested) | Approx. 505 lb-ft |
| Fuel Type | Gasoline |
| Fuel Delivery | Compatible with carbureted or EFI systems (not included) |
| Cooling System | Liquid-cooled |
| Block Material | Cast Iron |
| Cylinder Heads | Aluminum |
| Compression Ratio | Approx. 10.0:1 |
| Camshaft Type | Hydraulic Roller |
| Condition | Brand New (Factory Built) |
| Country of Origin | United States |
| Included Components | Fully assembled base long block with heads, camshaft, oil pan, and timing cover |
| Applications | Street performance, muscle cars, and custom GM small block–based builds |
Compliance & Disclaimer
All performance figures are approximate factory test data provided by Blueprint Engines.
Actual results may differ based on installation setup, accessories, and tuning calibration.
This engine is supplied as a base long block — it requires external components to complete installation.
It is not certified for emissions-controlled vehicles unless specifically noted by the manufacturer.
Professional installation is strongly recommended.
Questions & Answers
Have a question about this product? Ask below — we’ll reply as soon as possible.
Return & Refund Policy
- Return Period: Within 30 days of delivery.
- Condition: Unused, original packaging, all accessories included.
- Non-Returnable: Gift cards, personal care, custom or digital items, sale items.
- How to Return: Email support@fastoutboard.com for RMA and return address.
- Shipping: Customer pays unless item is faulty or incorrect.
- Refund: Processed within 5–10 business days after inspection.
Warranty
- Coverage: 1-Year limited warranty for manufacturing defects.
- Excludes: Misuse, wear, or unauthorized repair.
- Claim: Email proof and photos to support@fastoutboard.com.
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