Build Your Next Engine on a Solid Foundation with an ATK Performance Short Block Assembly

Whether you’re building a mild small block for a street rod or a turbocharged LS engine, an ATK Performance short block makes a great foundation. ATK technicians hand-assemble the engines in climate-controlled clean rooms using top-quality remanufactured and/or brand new parts. Mains are bored and align-honed. Rotating assemblies are balanced. Camshaft bearings are installed and clocked to OEM positions, and brass freeze plugs and oil galley plugs are installed and sealed. When your ATK short block arrives it’s ready for your build.

We had our expert tech reps put together some examples of engine combinations using ATK short block assemblies. If you like any of the recipes you see, give us a shout and we'll be happy to dial in one to fit your requirements.

Small Block Chevy, 355 C.I.D.
This build will make a very nice mild street or replacement truck engine.

ATK Street Performer Short Block Assembly
• Seasoned OEM four-bolt roller cam block, one-piece rear main seal, .040" overbore
• Cast crankshaft and powdered metal connecting rods
• Hypereutectic pistons with 12.3cc dish and moly rings

Oiling System
Summit Racing Pro Pack Oil Pan and Pump Kits

Camshaft, Timing Set, Harmonic Damper
Summit Racing Classic Cam and Lifter Kit
Summit Racing Camlock Plate and Cam Bolt Kit
Summit Racing True Roller Timing Set
Summit Racing OE-Style Harmonic Damper
Summit Racing Harmonic Balancer Bolt Kit

Cylinder Heads and Valvetrain
Summit Racing Vortec Cast Iron Cylinder Heads (2 required)
COMP Cams Magnum Steel Roller Tip Rocker Arms
Fel-Pro Cylinder Head Bolt Kit (2 required)
Summit Racing Head Gaskets (2 required)
Trick Flow Pro Calibrated Adjustable Pushrod Length Checker

Induction and Ignition
Summit Racing Intake Manifold, Carburetor, and Air Cleaner Pro Pack
Summit Racing Crate Engine Ignition Kit

Valve Covers and Engine Tin
Summit Racing Chrome Valve Covers
Proform Chrome Oil Filler Cap
Summit Racing Valve Cover Bolts
Fel-Pro PermaDry Valve Cover Gaskets
Proform Valve Cover Grommets
Summit Racing Chrome Timing Cover
Spectre Fuel Pump Block-Off Plate

GM LS, 408 C.I.D.
This is a great combo for mild turbo or nitrous builds.

ATK GM LS 408 Short Block Assembly
• OEM LQ4 iron block with ARP main studs, .030" overbore
• Manley 4340 forged crankshaft, 4.000" stroke, 58-tooth reluctor wheel
• Manley 4340 forged H-beam connecting rods with ARP 2000 bolts
• Forged pistons with 10cc dish
• Total Seal piston ring package with top rings gapped for engines pushing 10+ PSI of boost

Oiling System
Summit Racing Pro LS Cast Aluminum Oil Pan
Summit Racing Oil Pump

Camshaft, Timing Set, Harmonic Damper
Summit Racing Pro LS Turbo Camshaft
Summit Racing LS Lifter and Guide Kit
Summit Racing Camshaft Retainer Plate
Summit Racing Pro LS Billet Adjustable Timing Chain Set
Trick Flow Timing Chain Dampener
Summit Racing Cast Aluminum Timing Cover
Summit Racing Timing Cover Seal
Chevrolet Performance Front Cover Bolts (8 required)
Summit Racing Bracket Racer SFI Harmonic Damper
ARP Balancer Bolt

Cylinder Heads and Valvetrain
Trick Flow GenX® 220 Cylinder Heads for GM LS2 (2 required) 
Summit Racing Cylinder Head Bolt Kit
Fel-Pro PermaTorque MLS Head Gasket (2 required)
Trick Flow GM LS Engine Steam Line Plumbing Kit
Summit Racing Roller Rocker Arms for LS1/LS6
Trick Flow Pro Calibrated Adjustable Pushrod Length Checker
ICT Billet LS Lifter Valley Cover
Summit Racing Pro LS Valve Covers

EFI and Ignition
Holley EFI LS Single Plane Mid-Rise Intake Manifold
Holley EFI Fuel Rails
Holley Throttle Body Intake Elbow
Summit Racing High Output Coil Packs
Summit Racing 8mm Ignition Wires

Small Block Chrysler Magnum, 408 C.I.D.
You can build a hot street performance and bracket race engine with this recipe.

ATK Small Block Chrysler Magnum 408 Short Block Assembly
• Seasoned OEM 5.9L Magnum block, .040" overbore
• Scat nodular iron crankshaft 4.000" stroke
• Scat 4340 forged I-beam connecting rods with ARP 8740 bolts
• Hypereutectic pistons with moly rings

Oiling System
Canton Racing Street/Strip Wet Sump Oil Pan
Canton Racing Oil Pan Pickup
Melling Oil Pump
Milodon Oil Pump Driveshaft
Fel-Pro Oil Pan Gasket
Mr. Gasket Oil Pan Bolt Kit

Camshaft, Timing Set, Harmonic Damper
COMP Cams Xtreme Energy Hydraulic Roller Camshaft
Howards Cams Street Series Retrofit Hydraulic Roller Lifters
Cloyes Replacement Timing Chain Tensioner
Melling Timing Chain Set
Mopar Performance Camshaft Sprocket Bolt
Dorman Timing Cover
Professional Products PowerForce Harmonic Damper

Cylinder Heads and Valvetrain
Trick Flow PowerPort® 190 Cylinder Heads for Small Block Mopar (2 required)
Harland Sharp Heavy-Duty Roller Rockers
Trick Flow Rocker Arm Shaft Studs
Trick Flow Cylinder Head Bolt Kit
Fel-Pro Performance Head Gasket (2 required)
Trick Flow Pro Calibrated Adjustable Pushrod Length Checker

Induction and Ignition
Summit Racing Air Cleaner
Summit Racing M2008 Series Carburetor
Edelbrock Performer RPM Air-Gap Intake Manifold
Fel-Pro Performance Intake Manifold Gasket Set
Spectre Performance Intake Manifold Bolts
Summit Racing Billet Electronic Mopar Distributor
Summit Racing Muscle Car Retro Ignition Wires
Champion Racing Spark Plugs RC12YC (8 required)

Valve Covers
Mr. Gasket Chrome Valve Covers
Fel-Pro PermaDry Plus Valve Cover Gaskets
Trans-Dapt Performance Chrome Valve Cover Bolts (3 sets required)