inc. GST


BRAND: Blueprint Engines

SB Chev 355 c.i.d Long Block
373 hp/400 ft-lbs torque, 9.3:1 Comp

In Stock
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NOTE: Pictures of Crate Engines are for reference only, engine componenets & accessories are subject to change by manufacture without notice based on availability of parts at time of assembly.

Engine Features

  • HP & Torque: 373HP / 400 FT LBS
  • Compression Ratio: 9.3:1
  • Cast Iron Heads
  • Hydraulic Roller Cam
  • Cast Steel Crank
  • Hypereutectic Pistons


  • Hand picked seasoned block
  • Square and parallel decked
  • Align honed main bearing bore
  • Cylinders honed on computer controlled machine to within .0002 straightness and roundness
  • Cylinders are sonic tested for thickness
  • 2-Bolt Main
  • 4.000" Bored up to .060" Over
  • 1-Piece Rear Main Seal
  • Mech fuel pump provision: Yes
  • Passenger Side Dipstick
  • Drilled and tapped for clutch linkage


  • Cast steel crankshaft
  • 3.480" Stroke
  • OEM type 5.700" connecting rods
  • Hypereutectic pistons
  • Internal Front/ External Rear


  • Vortec cast iron heads
  • 64cc chamber
  • Hardened retainers and springs
  • 1.94 swirl polished intake valves
  • 1.50 swirl polished exhaust valves


  • Cam Type: Roller
  • .495/.502 lift
  • 221/226 duration
  • @ .050, 110 degrees LSA
  • Using 1.5 rockers


  • 34 Degrees Total at 3500 RPM


  • Valve covers
  • Oil pan
  • Timing cover
  • Dyno test results shipped with engine


  • Recommended to use Break in Oil For Your BluePrint Crate Engine
  • Not for EGR
  • Not for use in pollution controlled vehicles.
  • Has no cam sensor provisions.
  • This engine requires a non weighted harmonic balancer, and late 350ci weighted flexplate/flywheel.
  • If you are using an automatic transmission, BluePrint Engines recommends a 1800-2200 rpm stall converter.
  • This engine is NOT compatible with factory fuel injection. This will NOT work as an OE replacement for a vortec truck.

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