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SKU: B632FKB4L8X
BluePrint Engines GM Big Block Compatible 632 c.i. Pro Series Engine and 4L80E Automatic Transmission - 815 Horsepower - Blackout Reaper Edition Builder Series - Black Pulley Kit - Fuel Injected
$31,299.00
632 c.i. 815 Horsepower Builder Series

Horsepower & Torque: 815 Horsepower / 775 ft. lbs. Torque

Cylinder Heads: BluePrint Engines Aluminum Cylinder Heads

Compression Ratio: 11:1

Camshaft: Hydraulic Roller Cam - .698 Intake / .698 Exhaust Lift and 272 Intake / 282 Exhaust Duration @ .050 – 110 LSA

Pistons: Forged

Crankshaft: Forged Crank – 4.750" Stroke and Forged 6.635" Rods

Fuel Recommendation: 91+ Octane

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Financing available at checkout with Affirm

Overview:

BluePrint’s Blackout Reaper Edition takes the legendary 632 to a whole new level of attitude and intensity. This Builder Series package pairs 815 horsepower of pro-series big-block brutality with a rock-solid 4L80E automatic transmission, delivering a ready-to-run drivetrain with sinister style. The fuel-injected setup ensures razor-sharp throttle response, while the all-black Reaper treatment—down to the stealth pulley kit—makes it look as mean as it runs. With forged internals, precision machining, and the durability to take every ounce of its power, this Reaper 632 is built for those who want unmatched performance wrapped in a menacing finish. It’s big-block domination… in full blackout.

Description:

  • Horsepower & Torque: 815 Horsepower / 775 ft. lbs. Torque
  • Compression Ratio: 11.0:1
  • BluePrint Engines Aluminum Heads
  • BluePrint Engines Hydraulic Roller Cam
  • BluePrint Engines Forged Crank
  • BluePrint Engines Forged Pistons

Block:

  • BluePrint Engines High Strength Cast Iron Block
  • Manufactured and Machined in the USA!
  • 4-Bolt Main
  • 4.600" Bore
  • 1-Piece Rear Main Seal
  • Mech Fuel Pump Provision: Yes
  • Tall Deck (Cylinder Deck is Approx .400 Taller / Wider than OEM Block)

Rotating Assembly:

  • New BluePrint Forged Crankshaft
  • 4.750" Stroke
  • Forged H-beam 6.635" Connecting Rods
  • Forged Pistons
  • Internally Balanced Front and Rear

Cylinder Heads:

  • BluePrint Aluminum Cylinder Heads - PS8012
  • 119cc Chamber
  • 2.30" Intake / 1.88" Exhaust Valves
  • 358cc Intake / 125cc Exhaust Runners
  • Cylinder Heads Feature a .300 in. Raised Exhaust Port vs an OEM Casting

Cam Specs:

  • Hydraulic Roller
  • .698 Intake / .698 Exhaust Lift
  • 272 Intake / 282 Exhaust Duration
  • @.050-110 Degree Lobe Separation

Also Includes:

  • Pro Series Ready Run Distributor - BPP3503BK
  • Thermostat and Thermostat Housing
  • Sniper Stealth 4500 Black Finish
  • Aeromotive A1000 Fuel Pump
  • Single Plane Intake Manifold
  • Harmonic Balancer
  • Timing Cover
  • Valve Covers
  • Oil Pump
  • Oil Pan
  • Black Pulley Kit - BPP454FDPSAC4BK
    • Reverse Rotation Short Water Pump
    • 1- Wire 140amp Alternator
    • Peanut Style Air Conditioning Compressor
    • Type II Power Steering Pump with Remote Reservoir

Assembled with Complete 4l80e Automatic Transmission Package:

  • 4L80E Complete Package with Electronic Controller Included
  • W/Lockup Capability
  • 3800+ Stall Torque Converter
  • Flex Plate
  • Starter
    • Gear Ratios
    • 1: 2.482
    • 2: 1.482
    • 3: 1.00
    • 4: 0.750
    • R: 2.077

Notes:

  • Not for use in pollution-controlled vehicles.
  • This engine features .300 raised exhaust ports and .400 deck height increase over OEM.
  • Must verify clearance of exhaust, shift linkage, steering components etc. before ordering.
  • The front accessory drive on this engine fits many vehicles, however it is the customer responsibility to accurately measure and confirm fitment. Note this is a low-profile design, but things such as power steering hoses, alternator wiring, and additional fittings/fabrication may be required on some vehicles.

WARNING: Cancer and Reproductive Harm
Bragging Rights Included.

EVERY BLUEPRINT ENGINE ACES THE DYNO TEST

We make sure we hit our target horsepower and proper torque with every crate engine. We use an advanced computerized balancer in our in-house dyno testing rooms to get our rotating assemblies within two grams, ensuring silky smooth power over the entire RPM range. That’s precisely why our engines sound and run better than our competitors.

All specs, zero speculation: A comprehensive, dyno-generated printout showing your critical engine specs will accompany your delivered engine — every time. No more guessing or wondering what your installed engine’s real-world peak horsepower and torque ratings actually are. Any doubters in the crowd? Simply flash ‘em your exact engine’s dyno results.

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