383ci Boosted LT1 Long Block Engine

383ci Boosted LT1 Long Block Engine

Base Price $9,499

The 383ci Boosted Long Block is great for a Supercharger or Turbo that makes
up to 15 psi of boost and will be driven on the street. 

Peak Horsepower:  700bhp @ 6500rpm with around 14 psi of Boost
Peak Torque: 670lb/ft @ 4000rpm
Compression Ratio: 9.5:1
Operating Range: 2300 – 6500rpm
Required Fuel: 91+ Octane Pump Gasoline



  • GM LT1 Cast Iron Block
  •  Deck to Match Pistons
  •  Bored 4.030”
  •  Honed with Torque Plates and Pressure Washed
  •  New Durabond Cam Bearings Installed
  •  Billet Steel 4Bolt Main Caps, Line Bore and Hone
  •  ARP Main Studs 


  • Mahle Forged Boost Pistons


  • Clevite HSeries Main and Rod Bearings


  • Comp Cams Hydraulic Roller


  • GM Factory Oil Pan
  • GM Factory LT1 Timing Cover


  • Fel Pro Head Gaskets .040”
  • Fel Pro Performance Oil Pan, Timing Cover Gaskets


  • Scat 4340 Forged Steel
  • 3.750” stroke
  • Internally Balanced Front and Externally Balanced Rear


  • Scat 4340 Forged HBeam
  • 5.700” length
  • ARP Rod Bolts


  • Mahle Plasma rings, Gapped for Boost


  • Comp Cams Hydraulic Roller

Timing Sets:

  • Cloyes Extreme Duty Roller Timing Set 

Oil Delivery:

  • Melling Select Performance
  • Melling Pick Up Tube Tig Welded
  • Melling HD Drive



  • GM Aluminum LT1 Castings
  • Three Angle Performance Valve Job
  • Stage 2 Porting

Intake Valves: 

  • Manley Stainless Steel 2.00”

Exhaust Valves:

  • Manley Stainless Steel 1.56” 


  • Smith Brothers 5/16 .083” Wall Hardened

Combustion Chamber:

  • 54cc Combustion Chambers

Spring Package:

  • Lunati Polished Double Valve Springs
  • Light Weight Hardened Retainers and Locks 

Head Bolts:

  • ARP Performance

Rocker Arms:

  • Comp Cams Ultra Pro Magnum 1.6 ratio 

Here at Golen Engine we build each LT1 Street engine with the same meticulous process used in our line of racing engines to ensure top quality performance and reliability throughout its lifetime.

When you purchase one of our LT1 High Performance Street Engines you will receive a full spec sheet listing the exact components your engine was built with. We will also provide you with a complete Set Up Guide as well as full phone tech support to aid you with the installation process. It is mandatory for you to contact Golen Engine Tech Support before starting your engine for the first time and you can reach our Tech Support Line at 1-800-591-9171 ext 2.   

Each Golen Engine Performance Street Engine comes standard with a “One Year No Mileage Limit Warranty” to keep you confident and covered!

We are able to custom build your engine to match just about any specs you desire and offer a long list of proven upgrades, so if you do not see it just ask us!

Feel free to contact us anytime for help choosing the perfect performance engine combination!!

Thank you,

Golen Engine