Blueprint Engines Gm 396 C.I.D. 491 Hp Stroker Base Fully Dressed F.I. Long Block Crate Engines Bp3961Ctf

The Blueprint Engines GM 396 C.I.D. 491 HP Stroker Fully Dressed Fuel Injected Long Block Crate Engine (BP3961CTF) is a high-performance small block engine designed for enthusiasts who want dependable power and advanced fuel-injection technology in one ready-to-install package.

This engine is built from the ground up using 100% new components, with no remanufactured or recycled parts. Each unit is blueprinted, balanced, and dyno-tested in the USA to ensure consistent quality and performance.

With a hydraulic roller camshaft, aluminum cylinder heads, and forged rotating assembly, the BP3961CTF delivers impressive street performance and longevity. The EFI (Electronic Fuel Injection) system enhances throttle response, fuel efficiency, and cold-start reliability — ideal for modernized classic builds, restomods, or custom hot rods.

Performance Overview:

• Factory-tested output: approx. 491 HP and 518 lb-ft of torque

• Complete long block with fuel injection system and dress components

• Built with 100% new parts — no core or remanufactured components

• Balanced and dyno-tested in the USA

• Ready for street performance and modern EFI conversions

Key Highlights:

• GM small block stroker design for optimal displacement and torque

• High-flow aluminum heads for efficient combustion

• Hydraulic roller camshaft for smooth operation and longevity

• Forged crankshaft, rods, and pistons for strength under high loads

• Fully dressed configuration includes EFI intake, throttle body, valve covers, and oil pan

• Designed for performance builds requiring EFI precision

Ideal Applications:

• Classic GM vehicles and muscle cars

• Restomods and performance street builds

• EFI-converted hot rods and custom applications

• Off-road and track use (non-emissions-controlled vehicles)

Important Notes:

• Horsepower and torque figures are approximate factory test results; actual performance may vary based on intake, exhaust, and tuning setup.

• Not approved for use in emissions-controlled vehicles unless otherwise specified.

• Professional installation and calibration are strongly recommended for best results.

Key Technical Specifications