The ATK SP53 Chevy 383 Short Block is built to offer robust bottom end to your high-performance engine. Assembled with seasoned 4-bolt main block, forged 4340 steel crankshaft and forged aluminum piston, this flat top unit can easily handle big power.
- Block: Seasoned OE 4 Bolt Main 1pc Seal Roller Block P/S Dipstick
- Bore/Stroke: 4.040 x 3.750
- Year Range: 1986-2000
- Displacement: 383 C.I.D.
- Crankshaft: Scat 4340 Forged 3.750" Stroke Externally Balanced Rear/Internal Front 1pc.
- Connecting Rods: Scat 4340 Forged H Beam 5.700" ARP 8740 Bolts
- Pistons: Forged +5cc Flat Top
- Piston Rings: Moly Rings
- Compression Ratio: 58cc=11.9:1 / 64cc=11.1:1 / 70cc=10.3:1
- Camshaft Bearings: Installed & Clocked to OEM Position
- Freeze Plugs: Brass Installed & Sealed
- Oil Galley Plugs: Installed & Sealed
Every great build needs a solid foundation! For that reason, we take the hard work out of the picture by selling short blocks that are ready for you to complete yourself. Our GM Short Blocks are most commonly packaged as the engine block assembled with Pistons, Piston Rings and Crankshaft installed.
ATK specializes in muscle. With the highest quality internal parts and Dyno Proven combinations of every engine built, ATK is able to add the most bang for your buck and back it up with an industry leading warranty.
ATK High Performance Chevy 383 Stroker Short Blocks
• Oil: 10W30
• Harmonic Balancer/Damper: POWERBOND Internally Balanced 8" #PB1046-N
• Flex Plate / Flywheel: Externally Balanced 168 Tooth
• Balancer: Internal balance
• Flexplate/Flywheel: External balance (1987-Up 1 piece rear main)
• Head Gasket: .038" thickness or per application
• Oil: 10W30 Non synthetic
• Oil Filter: Wix or K&N per application
Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work for their application. Some modifications to the vehicle may be required using these and or other aftermarket parts.
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