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
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.
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