ATK Engines High Performance Short Block Small Block Chevy 427ci
059-SP48
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Small Block Chevy
This small block with big cubic inches makes for a great foundation for aggressive street or race builds.
Block Information:
- Dart SHP 4 bolt main, 2-piece rear main seal
- Bore/Stroke: 4.125" x 4.000"
- Displacement: 427ci
- Camshaft Bearings: Dura-Bond, installed and clocked to OEM position
- Freeze Plugs: Brass, installed and sealed
- Oil Galley Plugs: Installed and sealed
Rotating Assembly:
- Crankshaft: Scat 4340 Forged
- Balance: Internally balanced (front+rear)
- Rods: Scat 6.00" 4340 forged H beam with 8740 ARP bolts
- Compression Ratio: 58cc= 12.6:1 64cc= 11.7:1 / 70cc= 11.0:1
- Pistons: Forged flat top -6.9cc
- Rings: Plasmamoly
Recommended Components:
- Balancer: Internal balance
- Flexplate/Flywheel: Internal balance (Pre 1985 2-piece rear main engine)
- Head Gasket: .038" thickness or per application
- Oil: 10W30 Non synthetic for first 3000 miles
- Oil Filter: Wix or K&N per application
- Requires a reduced base circle camshaft
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:
I have some dart pro 1 aluminum heads I ran on a 350. Would they be compatible?
roller cam or hyd tap whats max lift @ .050 with base cir reduced.
Can I use 76cc heads for the street along with the factory spread bore intake. I would also like to keep the ram horn exhaust manifolds.
I am interested in your chev 427 pre 1985 small block, short block. I am restoring a 1969 corvette. Can I swap this short block for the OEM 350/350 hp short block and retain all the stock components? The only accessory the vehicle doesn’t have is AC.
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.