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Chevrolet Performance 5.7L/350ci L31 Long Block Crate Engine with Vortec Heads for GM Trucks/Vans

Chevrolet Performance 12530283

809-12530283

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$2,069.99
$1,899.99
ON SALE - $170.00 OFF
Chevrolet Performance 5.7L/350ci L31 Long Block Crate Engine with Vortec Heads for GM Trucks/Vans $1,899.99
L31 HD Engine
  • Vortec 64cc Cylinder Heads
  • 1996-2002 Chevrolet Express/GMC Savana (G2,G3)
  • 1996-2000 Chevrolet/GMC Pickup (CK2,CK3)
  • 1996-2000 GMC Suburban (CK2,CK3)
  • 1996-1999 Chevrolet/GMC Chassis (P3)
  • 3/4 and 1-Ton only

  • Chevrolet Performance 12530283 Details

    L31 HD Base Engine

    3-Year/100,000-Mile Warranty, some exclusions may apply 

    Fitment Notes: This engine is not intended for marine use.

    Specifications:

    Engine Make/Size
    Chevy Small Block
    Engine Assembly Style
    Long block
    Engine Balance
    Internal/External
    Assembled
    Yes
    RPM Power Range
    Idle-5000
    Horsepower
    250
    Cylinder Heads Included
    Yes
    Crate Engine Cylinder Head Material
    Cast iron
    Camshaft Style
    Hydraulic roller tappet
    Intake Manifold Included
    No
    Carburetor Included
    No
    Throttle Body Included
    No
    Distributor Included
    No
    Oil Pan Included
    Yes
    Timing Cover Included
    Yes
    Water Pump Included
    No
    Harmonic Balancer Included
    Yes
    Valve Covers Included
    Yes
    Flexplate Included
    No
    Flywheel Included
    No
    Air Cleaner Included
    No
    Spark Plugs Included
    No
    Spark Plug Wires Included
    No
    Computer Included
    No
    Wiring Harness Included
    No
    Rear Main Seal Style
    1-piece
    Quantity
    Sold individually
    Emission
    Not Legal
    CARB EO Number
    N/A
    CARB EO Number
    N/A
    Manufacturer's Part Number:
    12530283


    Free Shipping!

    The Chevrolet Performance Truck 350ci L31-R Long Block Assembly was designed as a direct replacement for 1996-2000 GM Full size Trucks and 1996 -2002 Full size Vans. This engine comes factory fresh, manufactured using the latest in high tech computer controlled equipment and are GM engineered, tested and validated to deliver smooth, dependable performance with a Limited 3 Year / 100,000 Mile warranty!

    Specifications:
  • *1986-2000 style block, 4 bolt mains
  • 1pc rear seal nodular iron crankshaft
  • Powdered metal connecting rods
  • Hypereutectic pistons 9.4:1 compression Ratio
  • Hydraulic roller camshaft: Int Lift .414", Exh Lift .428", Int Duration @.050" 191, Exh Duration @ .050" 196, Lobe Centerline-111
  • Vortec cylinder heads - 64cc, 1.94'' intake valve, 1.50'' exhaust valve
  • Also includes: Oil pan, timing cover, valve covers, harmonic balancer

    JEGS Easy Kits are designed by JEGS high performance racing professionals to help you get all the performance parts you need for your race car, hot rod or truck.

    GM Warranty

    Note: *Service engine block contains English threads. When used for 2001 and newer vehicles, must also use 2000 model year starter/transmission/engine mounting bolts.

  • 12530283 is rated 5.0 out of 5 by 8.
    Rated 5 out of 5 by from great got this to replace a 172K mile motor and put it in my toy, run great, purrs like a tiger !
    Date published: 2018-04-06
    Rated 5 out of 5 by from Flawless I purchased for my 99 suburban to replace a 300k L31 vin code R. Went in smooth no issues started first turn of the key. I have 500 miles on it just did a oil change zero issues. This is my 2nd motor I have purchased both are awesome other one has 15k miles on it. These are brand new not rebuilds and I highly recommend this motor
    Date published: 2017-10-25
    Rated 5 out of 5 by from 1996-2000 Chevy 5.7 4-bolt Installed in my Chevy Silverado 3 weeks ago and it's running like a champ. Super satisfied with this purchase.
    Date published: 2016-11-03
    Rated 5 out of 5 by from Very Happy with service and product. There were a couple issues with initial purchase approval but there was good communication with "real people" that made it all work out. The engine arrived VERY well crated. It was put in the truck and has been running perfectly every day for last couple weeks. Mechanic was so impressed he is recommending others to buy from JEGS.
    Date published: 2015-02-19
    Rated 5 out of 5 by from Great Products I purchased this L31-R 350ci long block for my 1998 Chevy k1500 Z71 4x4. I was very pleased with the packaging. Since i don't have the vortex on it and being a high performance guy i was a little disappointed with the output horse power with my truck being a 4x4. other than that, i'm pleased with the engines smooth running and dependability. Over all very happy with my purchase. Thanks Jegs.
    Date published: 2015-01-06
    Rated 5 out of 5 by from fast service great product,driven everyday we had it in three days installed it ,started with no problems. it is driven everyday in a delivery truck Thank You Jegs for a great product
    Date published: 2014-12-28
    Rated 5 out of 5 by from Fast delivery and went in with no problems so far so good
    Date published: 2014-12-26
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    I am aware that this engine is not drilled for a mechanical fuel pump. As sold, could the block be drilled and then used with a mechanical fuel. Does the cam installed as sold have a lobe to operate a mechanical fuel pump? thanks.

    Asked by: mep2jr
    This engine is made for use with an electric fuel pump, the cam has no lobe and the block has no hole or provision for a mechanical pump.
    Answered by: Rusty B
    Date published: 2018-06-12

    would this motor work on a 1994 k1500 if i was to ditch the tbi and put carb on this motor

    Asked by: jcaudill
    This would be the recommended engine - https://www.jegs.com/i/Chevrolet-Performance/809/12681430/10002/-1
    Answered by: Rusty B
    Date published: 2018-06-12

    I have a 1990 K1500 (not using the stock ECM or TBI) will my flywheel &700R4 transmission work with this engine? Are the heads vortec? Can you custom order this with a bigger cam - like to see 400 ft lbs of torque with QJet/performer intake/headers

    Asked by: Wanna go fast
    This would be the engine you will want, it is not Vortec and does not come with any custom options. https://www.jegs.com/i/Chevrolet-Performance/809/12681430/10002/-1
    Answered by: Rusty B
    Date published: 2018-06-12

    will this fit a 1994 1500 as long as i intend to ditch the tbi and go a different route, such as carb or efi

    Asked by: jcaudill
    We would recommend this engine - https://www.jegs.com/i/Chevrolet-Performance/809/12530283K/10002/-1
    Answered by: Rusty B
    Date published: 2018-06-11

    How many additional items will I need to purchase for the to put the motor in completely

    Asked by: Dee stone
    We would recommend this kit which includes the items necessary to put the engine together - https://www.jegs.com/i/Chevrolet-Performance/809/12530283K5/10002/-1
    Answered by: Rusty B
    Date published: 2018-06-08

    Is this engine compatible with my 97 Chevrolet Suburban K2500?

    Asked by: JT1980
    Yes, this would be the best choice for your Suburban.
    Answered by: Rusty B
    Date published: 2018-06-05

    Are the block and cylinder head bolt holes metric or standard thread? I plan to pull the heads for port work and larger valves; can you recommend a head stud kit?

    Asked by: mdr1
    The head bolts will be standard thread ans we would recommend this kit - https://www.jegs.com/i/JEGS-Performance-Products/555/83400/10002/-1
    Answered by: Rusty B
    Date published: 2018-05-31

    I have an omc marine engine will the intake and carb bolt up to this with vortec heads? Its a 5.7 as well looming for a replacement

    Asked by: Zane87
    They should bolt on, but marine use will void the warranty on this engine. We do have marine specific engines. https://www.jegs.com/p/Blueprint-Engines/First-Mate-Marine-Longblocks/3383204/10002/-1
    Answered by: Rusty B
    Date published: 2018-05-30
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