ATK HP05 Chevy 1987-1995 TBI 383 Stroker Base Engine



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This engine was designed to run in a 1987-1995 Chevy Pickup with the TBI 350CI engine. You must have a chip burned and headers to achieve the power ratings.

Engine Specifications:
• HP: 320
• TQ: 395
• Block: OE roller block 4 bolt main 1pc seal 1996-2000
• Bore/Stroke: 4.040” x 3.750”
• Displacement: 383CI
• Crankshaft: Scat Nodular Iron external balance rear of crank/internal balance front of the 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 (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s)
• Oil Pump: Melling STD Volume

Recommended Components:
• Balancer: Internally Balanced – PowerBond #PB1046-N
• Flexplate/Flywheel: Externally Balanced – Pioneer #FRA-159 (with Scat kit)
• Intake Manifold: OE or Edelbrock TBI Intake #3704
• Spark Plugs: Autolite #25
• Spark Plug Wires: Factory Replacements
• Water Pump: OE

Engine Info:
• 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: 1 5/8 Headers

Notes: Engine is meant for the 1987-1995 Chevy Trucks with a 350 TBI engine. ECM needs a chip burned to run properly.


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 in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.


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