Engines and Components› Engines, Blocks and Components
BLUEPRINT ENGINES
DRESSED LONGBLOCK W/ CARB
SKU: B05J MBP3550CTC
Moderate — 2–4 hours
Description
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 Balanced
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
218 Intake / 224 Exhaust Duration
@.050-112 Degree Lobe Separation
Also Includes:
Marine Intake Manifold
Valve Covers
Marine Carburetor (Brand will vary due to supply)
Distributor
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.
Fitment
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Specifications
| Brand | BLUEPRINT ENGINES |
| Part Number | B05J MBP3550CTC |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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