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Product Summary

Short Block Crate Engine Type, 9.025" Deck Height

  • Block: Dart Big M Sportsman 4 bolt main 2pc rear main seal
  • Bore/Stroke: 4.600” x 4.750”
  • Displacement: 6.3 L
  • Crankshaft: Scat 4340 forged internally balanced
  • Rods: Scat 4340 forged H beam with ARP 8740 bolts
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Key Specs

Crate Engine TypeShort Block
Engine Displacement6.3 liters
Camshaft TypeHydraulic Roller
Piston MaterialForged Aluminum
Crankshaft MaterialForged 4340 Steel
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Need To Know

Truck Shipment

Truck shipments must be pre-paid with a credit card, certified check or money order

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Return Policy

ATK Engines SP53 Details

ATK High Performance Chevy 383 Stroker Short Blocks

Your engine needs a rock-solid foundation to make the horsepower you crave; that's where these ATK High Performance Chevy 383 Stroker short blocks come in. With these blocks, all of the hard work has been done for you. Everything comes machined, clearanced, balanced, and blueprinted, so you have a bulletproof bottom-end that is ready to run. Just decide how mild or wild you want to go.

These ATK High Performance Chevy 383 Stroker short blocks include the following:

* Handpicked and seasoned 4-bolt main block
* Aligned and honed main bores
* Nodular iron crankshaft
* 3.75 in. stroke
* I-beam connecting rods
* Hypereutectic dish top pistons

CARB Warning

Follow EPA, CARB, and state regulations for engine changes

Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine

ATK Engines SP53 Specifications

KEY SPECS
MFG. Part #SP53
BrandATK Engines
Crate Engine TypeShort Block
Engine Displacement6.3 liters
Camshaft TypeHydraulic Roller
Piston MaterialForged Aluminum
Crankshaft MaterialForged 4340 Steel
Carburetor IncludedNo
Intake Manifold IncludedNo
Distributor IncludedNo
Connecting Rod MaterialForged 4340 Steel
Valve Covers IncludedNo
Engine BalanceInternal/External
Cylinder Heads IncludedNo
Rear Main Seal Style1-piece
Throttle Body IncludedNo
Oil Pan IncludedNo
Timing Cover IncludedNo
Water Pump IncludedNo
Harmonic Balancer IncludedNo
Flexplate IncludedNo
Flywheel IncludedNo
Air Cleaner IncludedNo
Spark Plugs IncludedNo
Spark Plug Wires IncludedNo
Computer IncludedNo
Wiring Harness IncludedNo
GENERAL
AssembledYes
Material TypeCast Iron
NotesGM 1986-2000 small block with 4.040 in. bore and 3.750 in. stroke, +5cc flat top pistons, Scat forged 5.700 in. connecting rods, ARP 8740 rod bolts, and moly rings.
Sold in QuantityEach
Connecting Rod Beam StyleH-Beam
Deck Height9.025"
Main Bolt Style4-Bolt
Piston StyleFlat Top
Main Journal TypeChevy 350
Customer Impersonation Script