Product Summary

Short Block Crate Engine Type, Internal Engine Balance

  • Oil: Conventional / Non Synthetic 10W30
  • Oil Filter: Wix or K&N
  • Timing: 34-36 Degrees
  • Spark Plug Gap: .035”
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Key Specs

Crate Engine TypeShort Block
Engine Displacement6.2 liters
Camshaft TypeHydraulic Roller
Piston MaterialForged Aluminum
Crankshaft MaterialForged 4340 Steel
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Need To Know

Made to Order

This custom item will ship when completed

Truck Shipment

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

Quick and Easy Returns

Return Policy

ATK Engines SP35NB Details

Looking to upgrade your old engine using your existing heads? This Short Block uses a 100% New American Made Block and is outfitted with a Scat crank kit. All the hard work is done, you just need to finish it off.

Engine Specifications:

• Block: 100% New American Made Block 1pc Seal

  • Bore/Stroke: 4.000” x 3.750”
  • Displacement: 377CI
  • Crankshaft: Scat 4340 forged external balance rear of the crank/internal balance front of the crank
  • Rods: Scat 4340 forged H beam with ARP 8740 bolts
  • Pistons: 2618 Forged -16cc dished with 2 valve reliefs
  • Compression Ratios: 58cc = 10.4:1 / 64cc = 9.8:1 / 70cc = 9.2:1 (can vary due to deck height/gasket thickness)
  • Rings: Plasmamoly
  • Camshaft Bearings: Dura-Bond, installed and clocked to OEM position
  • Freeze Plugs: Brass, installed and sealed
  • Oil Galley Plugs: Installed and sealed
  • Flexplate/Flywheel: External balance 168 tooth (with Scat kit)

    Recommended Components:

  • Balancer: Internal balance
  • Head Gasket: .038” or per application

    Engine Info:

  • Oil: Conventional / Non Synthetic 10W30
  • Oil Filter: Wix or K and N per application

    Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. ATK reserves the right to substitute parts used in engines if necessary.

  • 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 SP35NB Specifications

    KEY SPECS
    MFG. Part #SP35NB
    BrandATK Engines
    Crate Engine TypeShort Block
    Engine Displacement6.2 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
    Cylinder Heads IncludedNo
    Rear Main Seal Style1-piece
    Throttle Body IncludedNo
    Timing Cover IncludedNo
    Oil Pan 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
    Combustion Chamber Volume58cc
    Camshaft Duration (.050 in)225° intake / 238° exhaust
    Camshaft Lift (in).612 intake / .585 exhaust
    Bore x Stroke (in)4.060" x 3.620"
    AssembledNo
    Material TypeCast Iron
    GTIN Code00653517679001
    Sold in QuantityEach
    Connecting Rod Beam StyleH-Beam
    Piston StyleDish

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