High-Performance Short Block GM LS 6.0 364ci

Name: High-Performance Short Block GM LS 6.0 364ci
Brand: ATK ENGINES
SKU: 059-SP93-G4
Price: 4423.35 USD
Availability: InStock

^$4,423³⁵

Core Charge: ^$410⁰⁰

Truck Freight

Ships on Dec 02, 2026

Lowest Price Guarantee

Currently Unavailable

This product is currently not available. Please call customer service for assistance at 1-800-345-4545.

Gen III/IV LS 24 Tooth

High-Performance Short Block

GM LS 6.0 364ci

Cast Iron 6.0L Gen IV Block

OE Reground .010"/.010" Crankshaft 24 Tooth

4340 Forged I Beam Rods

2618 Forged Flat Top Pistons -3.2cc

ATK Core Return Process
JEGS and ATK appreciate your business and want to ensure that your core return is as smooth as possible.

Please CLICK HERE for ATK Core Return Process

Core return can be any Chevy LS 6.0L engine

Engine Specifications:

Block: Seasoned 6.0L Iron Gen IV
Bore/Stroke: 4.030” x 3.622”
Displacement (cu.in): 370
Crankshaft: OE reground 3.622” internally balanced 24 tooth
Rods: Scat 4340 forged I beam 6.125” ARP 8740 bolts
Pistons: Wiseco 2618 forged -3.2cc flat top
Rings: Wiseco GFX with steel top ring
Compression Ratios: 64cc = 10.6:1 / 68cc = 10:1 / 72cc = 9.7:1 (can vary due to deck height/gasket thickness)
Camshaft Bearings: Installed & Clocked to OEM Position
Freeze Plugs: Installed & Sealed
Oil Galley Plugs: Installed & Sealed

Recommended Components:

Balancer- Internal balance
Flexplate/ Flywheel- Internal balance
Head Gasket: .051” or per application
Oil Pump: Melling #10295 with high-pressure spring

Engine Info:

Oil: 10W40 Non-synthetic for first 3000 miles
Oil Filter: Wix or K&N per application

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

Please CLICK HERE for ATK Warranty

Short Blocks for Street or Strip

ATK Engines High-Performance Short Blocks provide the foundation for your next engine build for Gen I Small Block Chevys, Big Block Chevys, and Gen III/IV LS. These short blocks support mild to extreme horsepower in naturally aspirated or boosted applications.

Part TypeShort Block

Product LineATK Engines Small, Big Block Chevy & LS Short Blocks

BrandATK ENGINES

Package Height36.0

Package Width36.0

Package Length36.0

Weight357.0 PG

Part CategoryPerformance Parts

QuantitySold individually

Part FitmentSemi Universal

Vendor Part NumberSP93-G4

Package Qty1