ATK Chevy 383 Stroker Engine 87-95 TBI HP05

Item #22546 Brand:ATK Engines

Made in the USA
ATK Chevy 383 Stroker Engine 87-95 TBI HP05
HP05 ATK Chevy 383 320HP Stroker Engine Long Block
* ** THIS ITEM IS TEMPORARILY OUT OF STOCK *** FREE SHIPPING on ATK Engines. This item ships directly from the manufacturer and is not available for store pickup. Some engines are made-to-order or can be backordered. Delivery can be delayed up to 5 to 6 weeks but typically ship within 2 weeks.
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Add more muscle to your ride with this ATK HP05 Chevy 383 87-95 TBI stroker engine. It offers around 320 horsepower with 395 torque to meet the needs of power-demanding autos like pulling rigs, RVs and muscle trucks. The components are hand assembled and precisely balanced for delivering smooth performance.

Engine Specifications:

  • Horsepower: 320
  • Torque: 395 lbs./ft.
  • Block: OE roller block 4 bolt main 1pc seal
  • Bore/Stroke: 4.040" x 3.750"
  • Displacement: 383CI
  • Crankshaft: Scat nodular iron external balance rear of crank/internal balance front of crank
  • Rods: Scat I beam 5.7" rods with ARP 8740 bolts
  • Pistons: Hypereutectic 9.5:1 compression
  • Rings: Moly
  • Camshaft: Hyd. roller
  • Cam Specs: 198/210 @50 .435in/.462ex 116LSA
  • Timing Chain: Double roller
  • Cylinder Heads: OE TBI cast iron 67cc 1.94/1.50
  • Rocker Arms: Stamped steel 1.5
  • Oil Pan: Rear sump 5qt
  • Oil Pump: Melling STD volume
  • Weight: 410

ATK specializes in muscle. With the highest quality internal parts and Dyno Proven combinations of every engine built, ATK is able to add the most bang for your buck and back it up with an industry leading warranty.

Don't forget the engine paint!
Engine Paint


ATK High Performance GM 383 TBI Stroker 320 HP Stage 1 Long Block Crate Engines


Engine Information:

• Oil: Conventional/Non synthetic 10W30
• Oil Filter: Wix or K&N
• Timing: Set to factory specifications via PCM module- Must have performance chip burned
• Spark Plug Gap: .035"
• Firing Order: 18436572
• Octane: 91+
• Stall Converter: Stock
• Exhaust: headers

Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work for their application. Some modifications to the vehicle may be required using these and or other aftermarket parts.


Recommended Components:

  • Balancer: Internally balanced - Power Bond #PB1046-N
  • Flexplate/Flywheel: Externally balanced - Pioneer #FRA-159 (with Scat kit)
  • Intake Manifold: OE or Edelbrock TBI #3704
  • Spark Plugs: Autolite #605
  • Spark Plug Wires: OE or 8mm
  • Water Pump: OE

  • Shipping Instructions

    Shipping is free and lift gate will be provided.

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