Blueprint Marine GM Marine Small Block Compatible 383 c.i. Engine - 405 Horsepower - Long Block

• Horsepower & Torque: 405 Horsepower / 450 FT LBS
• Compression Ratio: 9.5:1
• Cast Iron Heads
• Hydraulic Roller Cam
• Cast Steel Crank
• 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:

• New Cast Steel Crankshaft
• 3.750" Stroke
• OEM Type 5.700" Connecting Rods w/ 150,000 PSI Bolts
• Hypereutectic Pistons
• External 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:

• Cam Type: Hydraulic Roller
• .495 Intake / .502 Exhaust Lift
• 220 Intake / 224 Exhaust Duration
• @.050-114 Degree Lobe Separation
• Using 1.5 Rocker's 

Also Includes:

• Marine Intake Manifold
• 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.