Item # 31963 BRAND: ATK Engines

ATK HP291P Chevy 350 Base Engine 325HP

ATK HP291P Chevy 350 Base Engine 325HP Price Includes $370 Core Charge
ATK HP291P Chevy 350 Base Engine 325HP Price Includes $370 Core Charge
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ATK HP291P Chevy 350 Base Engine 325HP Price Includes $370 Core Charge

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ATK HP291P Chevy 350 Base Engine 325HP

Product Overview:

Description

ATK HP291P Chevy 350 Base Engine, or Stage 1 Engine, is designed for those that may have their own component parts already and who also are interested in completing out the build themselves. A GM base engine typically consists of the following: Short Block, Camshaft, Timing set, Cylinder heads, Valve covers, Timing cover, oil pan, oil pump & pick up tube.

Engine Specifications:

  • HP: 330
  • TQ: 3380
  • Block: OE block 4 bolt main 1pc seal 1987-2000
  • Bore/Stroke: 4.040 x 3.480
  • Displacement: 350
  • Crankshaft: OE Reground external balance rear of crank/internal balance front of the crank
  • Rods: OE powder metal 5.7”
  • Pistons: Hypereutectic 9.1:1 compression
  • Rings: Moly
  • Camshaft: Hyd. flat tappet
  • Cam Specs: 224/234 @50 .465in/.488ex 112LSA
  • Timing Chain: Double roller
  • Cylinder Heads: Dart cast iron 76cc/165cc 1.94/1.50
  • Rocker Arms: Stamped steel 1.5 ratio
  • Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s)
  • Oil Pump: Melling high volume
  • Classic 350 with great street manners, and vacuum for all your power accessories. Your engine may not necessarily come with all components listed, but they are listed as our recommendations of parts to run for optimal performance.

    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.



    Don't forget the engine paint!
    Engine Paint

    Warranty

    Click Here for Warranty Information

    Specifications

    Engine Information:

    • Oil: Conventional / Non Synthetic 10W30 with Comp Cam zinc additive #159 for first 3000 miles
    • Oil Filter: Wix or K&N per application
    • Timing: 34-36 Degrees
    • Spark Plug Gap: .035”
    • Firing Order: 18436572
    • Octane: 91+
    • Stall Converter: 2200-2500
    • Exhaust: 1 5/8 Headers
    • Weight: 410 lbs.

    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 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.

    Shipping & Handling

    Shipping is free and lift gate will be provided.

    There is no core charge for this engine. You will not be required to send a core back to the manufacturer.

    In the Box

    Contents

    (1) ATK HP291P Chevy 350 Base Engine 325HP

    Guides & Accessories

    Accessories

    Recommended Components:

    • Balancer: PowerBond internal balance 8” #PB1046-N
    • Flexplate/Flywheel: Pioneer #FRA-159 external balance 168 tooth
    • Intake Manifold: Weiand stealth dual plane #8150
    • Distributor: HEI (Iron gear)
    • Water Pump: OE long pump
    • Carburetor: Quick Fuel 680CFM vacuum secondary’s with electric choke #HR-680
    • Fuel Pump: Holley mechanical 110GPH #12-327-11
    • Spark Plugs: Champion #RV12C
    • Spark Plug Wires: 8mm

    Reviews

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    Questions & Answers

    Will this ATK engine fit a 1956 Chevy 150 Handyman Wagon, where a Small block 400 C.I, is currently installed and running ? Trans is a TH400.

    Asked by: Eddie
    The 350 should easily replace any chevy small block. The challenge is will the bell housing bolt hole line up.
    Answered by: Anonymous
    Date published: 2023-09-06

    Will this drop in my C 1500 1988 with a turbo 350 in it

    Asked by: Travis
    We apologize for the confusion and inconvenience. We would have to advise you to speak directly to the manufacturer as these items drop ship. They can be reached by calling 866-721-2315.
    Answered by: Kelly H
    Date published: 2021-08-12

    I purchased a atk 291hp and it has about 2500 miles on it and there is a rotating sqeek near the distributor not belts or the distributor tried them both iam stumped 

    Asked by: Mechchris19
    We apologize for the confusion as well as for the inconvenience you seem to be having. We will have to advise you to speak directly with the manufacturer regarding this. They can be reached by calling: 866-721-2315.
    Answered by: Kelly H
    Date published: 2021-08-11

    Will this work for a 1964 Impala convertible 

    Asked by: Will
    Yes this engine will fit your 1963 Chevy Impala. Minor alterations may be necessary.
    Answered by: vince
    Date published: 2021-04-28

    Will this fit in my 1976 Delta 88 

    Asked by: Jacobsboi
    Yes the Chevy 350ci V8 will fit in the engine bay of the 1976 Olds 88, but there will be extensive modifications necessary to make it work such as electrical, exhaust system, fuel system, engine mounts, cooling system and A/C system upgrades. The 1976 Olds 88 came with the Oldmobile Rocket 350ci or 455ci engines from the factory.
    Answered by: vince
    Date published: 2021-04-24

    When will this mother available? Would like to order one.

    Asked by: Bruce62
    Please contact our Sales team by emailing help@eastwood.com or by calling them at 800-343-9353.
    Answered by: Kelly H
    Date published: 2021-01-10

    Will this motor fit in 1972, chevrolet c 10 truck

    Asked by: Jayhawk
    Yes. The ATK HP291P Checy 350 ci Engine (31963) will fit the engine bay of your 1972 Chevy C-10
    Answered by: vince
    Date published: 2020-12-06

    I have a 1993 2500 Chevrolet Silverado with the 5.7L and I want to upgrade. Will your engine be an easy swap. I also want to upgrade the throttle body and intake, what do you suggest?

    Asked by: Rustyp1963
    The Eastwood ATK HP291PChevy Base Engine will fit your vehicle and may require minor fabrication for linkages and fuel system items. We would recommend the Holley HP EFI 4bbl, Multi Port Fuel Injection System (22861) as this is a complete kit that includes the Single Plane Manifold the Throttle body, the multi port Injectorsand all necessary hardware & wiring.
    Answered by: vince
    Date published: 2020-12-02
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    ATK HP291P Chevy 350 Base Engine 325HP
    $4,109.00
    In Stock