BluePrint Crate Engine - SBC 396 491HP Base Model BP3961CT

The BluePrint SBC 396 491HP crate engine delivers serious power and reliability without the guesswork of a traditional rebuild. Every component—from the forged crankshaft and pistons to the precision-honed cast iron block—is engineered for consistency and durability on the street or strip. If you're building a hot rod, muscle car, or performance project that demands bolt-in simplicity with race-proven performance, this engine eliminates months of machine work and uncertainty.

BLOCK & FOUNDATION

• BluePrint cast iron block
• USA-manufactured, machined
• Align-honed main bores
• Computer-honed cylinders ±.0002"
• Sonic-tested wall thickness
• 4-bolt main caps
• 4.000" bore
• 1-piece rear seal
• Mechanical fuel pump ready
• Passenger-side dipstick
• Clutch linkage provision

ROTATING ASSEMBLY

• Forged BluePrint crankshaft
• 3.875" stroke
• Forged I-beam rods (6.000")
• Forged pistons
• Internal/external balancing

CYLINDER HEADS

• BluePrint aluminum (HP8103)
• 64cc combustion chambers
• 2.08" intake valves
• 1.60" exhaust valves
• 220cc intake runners
• 67cc exhaust runners
• .500" raised ports

CAMSHAFT & IGNITION

• Hydraulic roller cam
• .544" intake lift
• .555" exhaust lift
• 230° intake duration
• 236° exhaust duration
• 110° lobe separation
• 34° total timing @ 3500 RPM

PERFORMANCE & SPECS

• 491 HP output
• 509 ft-lbs torque
• 10.4:1 compression ratio
• 396 cubic inches (true 389 CID)
• Small Block Chevy platform
• 93+ octane fuel required

INCLUDED

• Valve covers
• Oil pan
• Timing cover