Product Summary

Short Block Crate Engine Type, Internal Engine Balance

  • Oil: Conventional / Non Synthetic 10W30
  • Oil Filter: Wix or K&N
  • Timing: 34-36 Degrees
  • Spark Plug Gap: .035”
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Key Specs

Crate Engine TypeShort Block
Engine Displacement5.7 liters
Camshaft TypeHydraulic Roller
Piston MaterialForged Aluminum
Crankshaft MaterialCast Iron
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Need To Know

Made to Order

This custom item will ship when completed

Truck Shipment

Truck shipments must be pre-paid with a credit card, certified check or money order

Quick and Easy Returns

Return Policy

ATK Engines SP76-B Details

ATK High Performance Chevy LM7 5.7L/347 Short Blocks

ATK Chevy LM7 5.7L/347 short blocks provide a solid foundation for your build. Produced for the 1999-2007 trucks, LM7 engines are very popular engines to swap into musclecars and other LS swap vehicles. ATK High Performance Chevy LM7 5.7L/347 short blocks are built for naturally aspirated engines up to 700 hp.

Your ATK LM7 engine may include these components for optimal performance:

* Block: GM LM7 5.3L
* Bore/stroke: 3.903 x 3.622
* Displacement: 5.7/347 c.i.d.
* Crankshaft: OE reground 3.622 in., internally balanced 24-tooth
* Connecting rods: Scat Premium Pro 4340 forged I-beam with ARP 8740 bolts
* Pistons: Wiseco 2618 forged aluminum with coated skirts
* Piston rings: Wiseco GFX (alloy steel top ring)
* Camshaft bearings: Installed and clocked to OEM position
* Freeze plugs: Brass installed and sealed
* Oil galley plugs: installed and sealed
* Weight: 285 lbs.

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

ATK Engines SP76-B Specifications

KEY SPECS
MFG. Part #SP76-B
BrandATK Engines
Crate Engine TypeShort Block
Engine Displacement5.7 liters
Camshaft TypeHydraulic Roller
Piston MaterialForged Aluminum
Crankshaft MaterialCast Iron
Carburetor IncludedNo
Intake Manifold IncludedNo
Distributor IncludedNo
Connecting Rod MaterialForged 4340 Steel
Valve Covers IncludedNo
Engine BalanceInternal
Cylinder Heads IncludedNo
Rear Main Seal Style1-piece
Throttle Body IncludedNo
Timing Cover IncludedNo
Oil Pan IncludedNo
Water Pump IncludedNo
Harmonic Balancer IncludedNo
Flexplate IncludedNo
Flywheel IncludedNo
Air Cleaner IncludedNo
Spark Plugs IncludedNo
Spark Plug Wires IncludedNo
Computer IncludedNo
Wiring Harness IncludedNo
Reluctor Wheel24x
GENERAL
Camshaft Duration (.050 in)220° intake / 224 ° exhaust
Camshaft Lift (in).528 intake / .536 exhaust
Bore x Stroke (in)4.040" x 3.480"
AssembledYes
Material TypeCast Iron
GTIN Code00653517725210
NotesCompression options range from 8.9:1-9.5:1 depending on deck height and gasket thickness.
Sold in QuantityEach
Connecting Rod Beam StyleI-Beam
Deck Height9.24"
Main Bolt Style6-bolt
Piston StyleDish
Main Journal TypeChevy LS

Questions & Answers

Fitment

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