GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block
GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block
GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block
GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block
GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block
GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block
GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block
GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block
GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block
GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block

GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block

SKU: MBP3550CT

GM Marine Small Block Compatible 350 c.i. Engine - 350 Horsepower - Long Block

SKU: MBP3550CT

Horsepower & Torque: 350 Horsepower / 400 ft. lbs. Torque

Cylinder Heads: Cast Iron Vortec

Compression Ratio: 9.5:1

Camshaft: Hydraulic Roller - .480 Intake / .489 Exhaust Lift and 226 Intake / 236 Exhaust Duration @ .050 - 112° LSA

Pistons: Hypereutectic

Crankshaft: Cast Crank - 3.480" Stroke and 5.700" Rods

Fuel Recommendation: 91+ Octane

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Description: 

  • Horsepower & Torque: 350 Horsepower / 400 FT LBS
  • Compression Ratio: 9.5:1
  • Cast Iron Heads
  • Hydraulic Roller Cam
  • Cast Crankshaft
  • Hypereutectic Pistons

Block:

  • BluePrint Engines High Strength Cast Iron 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
  • 4-Bolt Main
  • 4.000" Bore
  • 1-Piece Rear Main Seal
  • Mech Fuel Pump Provision: Yes
  • Passenger Side Dipstick Drilled and Tapped for Clutch Linkage

Rotating Assembly:

  • Cast Crankshaft
  • 3.480" Stroke
  • OEM Type 5.700" Connecting Rods
  • Hypereutectic Pistons
  • Internal Front/ External Rear Engine Balance

Cylinder Heads:

  • Vortec Cast Iron Cylinder Heads
  • 1.94 Intake Valves
  • 1.50 Exhaust Valves
  • Hardened Push Rods
  • Long Slot Rockers with Positive Lock Adjusting Nuts

Cam Specs:

  • Hydraulic Roller Cam
  • .480 Intake / .489 Exhaust Lift
  • 226 Intake / 236 Exhaust Duration
  • @.050-112° Lobe Separation Angle

Ignition Timing:

  • 34 Degrees Total at 3500 RPM

Also Includes:

  • New Cast Iron Marine Intake
  • Valve Covers
  • Oil Pan

Notes:

  • This engine is designed for CARBURETED use only. It is NOT for use in any factory fuel injected applications.
  • Replaces Standard Rotation engines only. Not available as reverse rotation.
  • BluePrint Engines recommends the use of a flame arrestor in marine applications and advises checking local laws to ensure compliance with the United States Coast Guard Requirements for Ignition Protection & Fire Resistance.
 

Your BluePrint engine was dyno tested with the parts and specifications listed below. If you prefer to install a different part, your engine may not produce the horsepower recorded on your dyno sheet.

Part Number: MBP3550CT

Fuel Delivery Type: Carbureted, 600 cfm *Not Included*

Spark Plug: Champion 13

Spark Plug Gap: .045"

Harmonic Balancer: No

Flexplate/Flywheel: No

Stall Converter: N/A

Intake Manifold: Marine, cast iron

Fuel Recommendation: 91+ Octane Approved

Timing (Initial/Total Advance): Initial timing - 10-16° and Total timing 32-34°

Firing Order: 1,8,4,3,6,5,7,2

Notes: Recommended break in oil for your BluePrint Crate Engine: BPP710, Not for EGR

Header Partners: 
Click here for our Header Partners and recommendations.

Click here to download a copy of the Installation Guide that came with your BluePrint engine.

BETTER THAN THE REST.

At BluePrint Engines, customer satisfaction is our highest priority. Every engine is built using high-quality components, with each rotating assembly balanced to within two grams of specification. Before shipment, every crate engine is dyno tested and certified to ensure it is ready to deliver the horsepower and torque you expect.

To stand behind that level of quality, BluePrint Engines offers industry-leading warranty coverage, providing confidence and peace of mind whether the engine is installed by an individual or a professional installer. Our standard warranty is fully transferable, adding long-term value and reassurance for our customers.

Warranty Coverage Details:

  • BluePrint Engines (including Builder Series)- Standard Warranty 30 months or 50,000 miles (parts and labor)*
  • BluePrint Engines Extended Warranty- 48 months or unlimited miles (parts and labor)*
  • Race / Motorsports Engines -No warranty
  • Marine Engines- 12 months (parts and labor)
  • Short Blocks-12 months (parts only)
  • Bare Blocks- 6-Month Unaltered
  • International Sales- Warranty coverage is handled by the in-country distributor

*Applies to eligible engine part numbers beginning with “B” or “P.” Warranty coverage is subject to terms and conditions. Proper installation and maintenance are required.

Please refer to full warranty documentation for complete details click here.

IT ALL COMES DOWN TO RESULTS.

We make sure we hit our target horsepower and proper torque with every crate engine. We use an advanced computerized balancer 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.

BRAGGING RIGHTS INCLUDED!

A comprehensive, dyno-generated printout showing these critical specs will accompany your delivered engine. 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 dyno results!

This engine will be dyno tested before it ships to you at no additional charge (others charge $500)!

RECOMMENDED PRODUCTS:
Harmonic Balancer - GM SB Compatible - Internally Balanced
BluePrint Engines Crate Engine Break-In Oil — 1 Quart
BluePrint Engines 10w30 Engine Oil - 1 Quart
TrueBlue Performance Octane Boost
BluePrint Engines TrueBlue Performance Octane Booster
BluePrint Engines TrueBlue UltraCool Antifreeze Coolant CONCENTRATE
BluePrint Engines TrueBlue Power Steering Fluid
BluePrint Engines TrueBlue Transmission Fluid UNIVERSAL ATF/MTF
GM SB and BB Compatible Oil Filter
8mm Spark Plug Wire Set - 90° Boots - GM SB Compatible
Liquid Filled Fuel Pressure Gauge - 0-15 psi
8.65mm Classic BluePrint Blue- Assembled Spark Plug Wire Set - 90° Boots - GM SB Compatible
BluePrint Parts - Valve Cover Kit - Black - GM Small Block Compatible