GM Marine Small Block Compatible 383 c.i. Engine - 405 Horsepower - Base Dressed - Carbureted

Description: Horsepower & Torque: 405 Horsepower / 450 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 .0002Straightness 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 3.750" 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 / 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 Deg