Item # 22728 BRAND: ATK Engines

ATK Chevy LM7 383CI Short Block -15cc Dished Pistons 24 Tooth SP78 Engine

SP78 ATK Chevy LM7 383CI Short Block -15cc Dished Pistons 24 Tooth
SP78 ATK Chevy LM7 383CI Short Block -15cc Dished Pistons 24 Tooth
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SP78 ATK Chevy LM7 383CI Short Block -15cc Dished Pistons 24 Tooth

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ATK Chevy LM7 383CI Short Block -15cc Dished Pistons 24 Tooth SP78 Engine

Product Overview:

Description

Dominate the streets and strips with sheer power by installing this ATK SP78 Chevy LM7 383CI Short Block. It is designed for naturally aspirated engines of up to 700 horsepower, making it suitable for hardcore rides. The short block is internally balanced and comes with premium-quality forged parts to deliver reliable performance.

Engine Specifications:

  • Block: GM LM7 5.3L
  • Bore/Stroke: 3.903 x 4.000
  • Displacement: 383CI.
  • Crankshaft: K1 4340 Forged 4.000" Internally Balanced 24 Tooth
  • Connecting Rods: Scat Premium Pro 4340 Forged I Beam 6.125" ARP 8740 Bolts
  • Pistons: Wiseco 2618 Forged -15cc Dished - Coated Skirts
  • Piston Rings: Wiseco GFX (Alloy Steel top ring)
  • Camshaft Bearings: Installed & Clocked to OEM Position
  • Freeze Plugs: Brass Installed & Sealed
  • Oil Galley Plugs: Installed & Sealed
  • Weight: 285

Every great build needs a solid foundation! For that reason, we take the hard work out of the picture by selling short blocks that are ready for you to complete yourself. Our GM Short Blocks are most commonly packaged as the engine block assembled with Pistons, Piston Rings and Crankshaft installed.

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

In the Box

Guides & Accessories

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Questions & Answers

What would compression ratio be with 64cc heads?

Asked by: I dont have one
best answered by the manufacturer please contact them
Answered by: eastwood alsip
Date published: 2022-03-25
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ATK Chevy LM7 383CI Short Block -15cc Dished Pistons 24 Tooth SP78 Engine
$3,842.00
In Stock