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ATK HP105 Chevy 383 Stroker Marine Base Engine 380HP

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#35020139

ATK HP105 Chevy 383 Stroker Marine Base Engine 380HP

Oil: Conventional / Non Synthetic 10W30
Oil Filter: Wix or K&N
Timing: 34-36 Degrees with vacuum port plugged on carburetor

$6,266.99

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Product Summary

Long Block Crate Engine Type, 9.1:1 Compression Ratio

Oil: Conventional / Non Synthetic 10W30
Oil Filter: Wix or K&N
Timing: 34-36 Degrees with vacuum port plugged on carburetor
Spark Plug Gap: .035”

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Key Specs

Crate Engine Type	Long Block
Compression Ratio	9.1:1
Engine Displacement	377 cu. in.
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Cast Iron

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Need To Know

Made to Order

This custom item will ship when completed

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ATK Engines HP105 Details

This engine is ATK’s reman version of the Mercruiser 377CI MPFI engine with a 4.030? bore (383ci). It has the upgraded 4340 Forged Crankshaft and Forged Pistons along with the Mercruiser camshaft installed. It is to be used with the Mercruiser MPFI system, aftermarket EFI or a carburetor conversion. This engine will make 405HP @ the crankshaft and 380HP @ the prop which is how Mercruiser rated their power ratings.

Engine Specifications:

HP: 380 Prop

Block: OE roller block 4 bolt main 1pc seal 1996-2000

Bore/Stroke: 4.040 x 3.750

Displacement: 383 (Reman Mercruiser 377)

Crankshaft: Scat 4340 forged external balance rear of crank/internal balance front of the crank

Rods: Scat 4340 forged I beam with ARP 8740 bolts

Pistons: Forged 9.1:1` compression

Rings: Moly

Camshaft: Hyd. roller

Cam Specs: 215/220 @50 .457in/.474ex 112LSA

Timing Chain: Single Roller

Cylinder Heads: Dart vortec cast iron 67cc/165cc 2.02/1.60

Rocker Arms: Stamped steel 1.5 rockers

Oil Pan: Rear sump 5qt

Oil Pump: Melling

Flexplate/Flywheel: Pioneer #FRA-159 external balance 168 tooth (with Scat kit)

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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Warranty (ATK Engines)

Technical Information (ATK Engines)

CARB Warning

Follow EPA, CARB, and state regulations for engine changes

Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine

CA Prop 65

CARB warning

ATK Engines HP105 Specifications

KEY SPECS
MFG. Part #	HP105
Brand	ATK Engines
Crate Engine Type	Long Block
Compression Ratio	9.1:1
Engine Displacement	377 cu. in.
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Cast Iron
Piston Material	Forged Aluminum
Carburetor Included	No
Intake Manifold Included	No
Distributor Included	No
Valve Covers Included	Yes
Cylinder Heads Included	No
Throttle Body Included	No
Timing Cover Included	No
Oil Pan Included	No
Water Pump Included	Yes
Harmonic Balancer Included	No
Flexplate Included	No
Flywheel Included	No
Air Cleaner Included	No
Spark Plugs Included	No
Spark Plug Wires Included	No
Computer Included	No
Wiring Harness Included	No

GENERAL
Bore x Stroke (in)	4.040" x 3.750"
Material Type	Iron
GTIN Code	00653517527357
Sold in Quantity	Each

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Fitment

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Gen 1 L05 Small Block Chevy

1996-1999 Chevy K1500

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Vortec L31 Small Block Chevy

1992-1995 Chevy K1500 Suburban

Gen 1 L05 Small Block Chevy

1996-1999 Chevy K1500 Suburban

Gen 1 L05 Small Block Chevy
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Vortec L31 Small Block Chevy

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Vortec L31 Small Block Chevy

1992-1995 Chevy K2500 Suburban

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1996-1999 Chevy K2500 Suburban

Gen 1 L05 Small Block Chevy
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1996-1999 Chevy K3500

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Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1987 Chevy R10 Suburban

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Gen 1 L05 Small Block Chevy

1988 Chevy R10 Suburban

Gen 1 L05 Small Block Chevy

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Gen 1 L05 Small Block Chevy

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Gen 1 L03 Small Block Chevy
Gen 1 L05 Small Block Chevy

1988 Chevy R20

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1987-1988 Chevy R20 Suburban

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