BluePrint GM engines give you brute, honest horsepower that'll leave others in your rear view mirror. Produced from hand-picked, seasoned four-bolt main blocks and precision built to exacting specifications.
Power: 310 HP @ 5200 RPM, 360 ft. lbs. of torque @ 3800 RPM
Displacement: 383 CID
Bore x Stroke: 4.040” x 3.75”
Compression Ratio: 9.5:1
Recommended Fuel: 91 Octane
Block: Cast Iron, 1 piece rear seal, 4-bolt main caps with passenger side oil dip stick hole, brass freeze plugs.
Crankshaft: Cast Steel, polished, stress relieved and shot peened with chamfered oil holes
Connecting Rods: Heavy Beam with 150,000 psi bolts
Camshaft: Steel Flat Tappet
Cam Lift: .480” Intake / .486” exhaust
Cam Duration @ .050”: 229 deg. Intake / 230 deg. Exhaust
Lobe Separation: 112 Degree
Cylinder Heads: Cast Iron '87 - '95 Intake Bolt Pattern.
Combustion Chamber: 68cc
Valves: 2.02” Intake/ 1.60” Exhaust
Rocker Arms: Stamped Steel, 1.5:1 Ratio
Valve Springs: 1.25” Diameter
Ignition Timing: Base 10 degrees BTDC, 32 degrees total
• Fully assembled long block
• Stamped Steel Chrome Valve Covers
• Melling High Volume Oil pump, pick-up and oil pan
• Front timing cover with 8” timing pointer
• Oil Filter Adapter
• Dyno Test Sheet
BluePrint limited 30 month / 50,000 mile parts & labor warranty. Click Here to view or download warranty form.