SKU: BP4002
GM Small Block Compatible 400 c.i. - Short Block
$5,899.00
400 c.i. Short Block

Compression Ratio: 10.3:1 with 64 cc heads and .041 in. Head Gasket

Pistons: Forged

Crankshaft: Forged Crank - 3.750" Stroke and 5.700" Rods

Fuel Recommendation: 91+ Octane

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Built for strength and reliability, this 383ci small block Chevy features a premium forged rotating assembly, including a BluePrint forged steel crankshaft and forged pistons. At its foundation is a high-strength cast iron block that is manufactured and machined in the USA, complete with a splayed 4-bolt main design for added durability. The engine retains key street-friendly features such as a mechanical fuel pump provision, clutch linkage mounting points, and a passenger-side dipstick. With a 4.125" bore, 3.750" stroke, and heavy-duty connecting rods equipped with 150,000 PSI bolts, this combination delivers the strength and performance needed for both spirited street use and demanding applications.

Description:

  • Compression Ratio: 10.3:1
  • BluePrint Engines Forged Crank
  • BluePrint Engines Forged Pistons

Block:

  • BluePrint Engines High Strength Cast Iron Block
  • Manufactured and Machined in the USA!
  • Drilled and Tapped for Clutch Linkage
  • Mech Fuel Pump Provision: Yes
  • Passenger Side Dipstick
  • 1-Piece Rear Main Seal
  • Splayed 4-Bolt Main
  • 4.125" Bore

Rotating Assembly:

  • BluePrint Forged Steel Crankshaft
  • 3.750" Stroke
  • 5.700" Connecting Rods w/ 150,000 PSI Bolts
  • Forged Pistons - 16cc
  • Internally Balanced Front / Externally Balanced Rear 

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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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