Product Summary

400, Long Block Crate Engine Type, 473 ft./lbs. Torque

  • It has all aluminum heads and roller cams
  • Rotating assembly balanced to within 2 grams
  • Features a new forged crankshaft with 5.7" connecting rods
  • This GM 400 c.i. engine puts out 508 horsepower and 473 ft lb. of torque
  • The cylinders honed on computer controlled machine to within .0002 straightness and roundness

Key Specs

MFG. Part #BP4002CTC1
BrandBluePrint Engines
Crate Engine TypeLong Block
Engine Displacement400 cu. in.

Need To Know

Truck Ship

Truck shipments must be pre-paid with a credit card, certified check or money order

Quick and Easy Returns


True Blue Power! BluePrints pro engine builders are enthusiasts just like you and it shows in the quality and performance of every engine they build. Each BluePrint crate engine is carefully dyno tested and ships with printed, proven results. If you’re looking serious horsepower at an affordable price, BluePrint Engines is the choice for you!

GM 400 - Base Dressed Engine - Aluminum Heads - Roller Cam


  • HP & Torque: 508 HP / 473 FT LBS
  • Compression Ratio: 10.3:1
  • Aluminum Heads
  • Forged Pistons
  • Roller Cam
  • Forged Crank
  • Part #: BP4002CTC1


  • BRAND NEW BluePrint Cast Iron Block
  • 4 Bolt Mains
  • Square and parallel decked
  • Align honed main bearing bore
  • Cylinders are sonic tested for thickness
  • Cylinders honed on computer controlled machine to within .0002 straightness and roundness
  • 1-Piece Rear Main Seal

Rotating Assembly

  • New forged crankshaft
  • 5.7" connecting rods
  • 150,000 psi rod bolts
  • Forged pistons
  • Hastings moly rings
  • Rotating assembly balanced to within 2 grams
  • High volume oil pump
  • Hydraulic roller cam
  • Roller lifters

Cylinder Heads

  • BluePrint aluminum - 64cc chamber
  • Hardened retainers and springs
  • 2.08 swirl polished intake valves
  • 1.60 swirl polished exhaust valves
  • BP Aluminum Head Part# H8103

Cam Specs

  • Cam Type: Roller
  • .553 Intake .576 Exhaust
  • 236 Intake / 242 Exhaust duration
  • @ .050 - 110° lobe separation
  • 1.6 Roller rockers

Ignition Timing

  • 10-16° inital and total timing 32-34° at 3500 RPM

Also Includes

  • Intake Manifold - dual plane, satin aluminum
  • Carburetor - Holley 850cfm HOLLEY 04781/ MANUAL CHOKE
  • Valve covers, oil pan and timing cover
  • Brass freeze plugs
  • Dyno test results shipped with engine


  • 30 month / 50,000 mile


NEW BluePrint block manufacturedand machined in the USA!Not for EGR



CARB Warning

Follow EPA, CARB, and state regulations for engine changes

Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine


MFG. Part #BP4002CTC1
BrandBluePrint Engines
Crate Engine TypeLong Block
Engine Displacement400 cu. in.
Horsepower508 horsepower
Compression Ratio10.3:1
Torque473 ft./lbs.
Camshaft TypeHydraulic Roller Tappet
Cylinder Head MaterialAluminum
Piston MaterialForged Aluminum
Crankshaft MaterialForged Steel
Camshaft Duration (.050 in)236° intake / 242° exhaust
Camshaft Lift (in).555 intake / .576 exhaust
Intake Manifold IncludedYes
Distributor IncludedYes
Warranty30 month / 50,000 miles
Valve Covers IncludedYes
Cylinder Heads IncludedYes
Rear Main Seal Style1-piece
Oil Pan IncludedYes
Timing Cover IncludedYes
Water Pump IncludedNo
Harmonic Balancer IncludedNo
Flexplate IncludedNo
Flywheel IncludedNo
Air Cleaner IncludedNo
Spark Plugs IncludedNo
Spark Plug Wires IncludedNo
Camshaft IncludedYes
BlockNew cast iron, 4 bolt main
GTIN Code816671020755
NotesRecommended oil for your BluePrint Crate Engine: 10W30, Non-Synthetic, Not for EGR