ATK Engines High Performance Short Block GM LS 5.3/5.7
059-SP76
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LS Gen III/IV
This short block is built for naturally aspirated engines up to 700hp.
Block Information:
- Seasoned OE 1999-2007 GM LM7 5.3L
- Bore/Stroke: 3.903" x 3.622"
- Displacement: 347ci
- Camshaft Bearings: Installed and clocked to OEM position
- Freeze Plugs: Installed and sealed
- Oil Galley Plugs: Installed and sealed
Rotating Assembly:
- Crankshaft: OE reground .010"/.010" 24 tooth reluctor wheel
- Rods: Scat Pro 4340 Forged I Beam Rods with ARP 8740 bolts
- Compression Ratio: 65cc= 9.5:1 67cc= 9.3:1 / 70cc= 8.9:1
- Pistons: Wiseco 2618 Forged dished -11cc
- Rings: Wiseco GFX (alloy steel top ring)
Recommended Components:
- Balancer: Internal balance
- Flexplate/Flywheel: Internal balance
- Head Gasket: .051" thickness or per application
- Oil: 10W40 Non synthetic for first 3000 miles
- Oil Filter: Wix or K&N per application
- Oil Pump: Melling #689-10295 with high pressure spring
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
Specifications:
How would it hold under 20 psi of boost
Can this motor fit in a 1986 gmc c10 with different motor mounts
Can I swap this block into any car that originally came with a 5.7 ls1?
Will LS4 heads fit on this short block . Got low miles LS 4 .
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.