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This engine makes a great foundation for a mild performance build or a good upgrade for a worn out short block.
Block Information:
- Seasoned OE 4 bolt main 1pc seal 1991-1995 Gen V
- Bore/Stroke: 4.310" x 4.000"
- Displacement: 454ci
- 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: OE cast crank reground .010"/.010"
- Balance: External rear (flexplate/flywheel), internal front (haromonic balancer)
- Rods: OE reman powder metal 6.135"
- Compression Ratio: 109cc= 8.9:1 / 116cc= 8.5:1 / 119cc=8.3:1
- Pistons: Hypereutectic flat top with 2 valve reliefs
- Rings: Plasmamoly
Recommended Components:
- Balancer: External balance
- Flexplate/Flywheel: External balance
- Head Gasket: .038" thickness or per application
- Oil: 10W30 Non synthetic for first 3000 miles
- Oil Filter: Wix or K&N per application
Notes:
- No mechanical fuel pump provision
Short Blocks for Street or Strip
ATK Engines High-Performance Short Blocks provide the foundation for your next engine build for Gen I Small Block Chevys, Big Block Chevys, and Gen III/IV LS. These short blocks support mild to extreme horsepower in naturally aspirated or boosted applications.
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