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Chevrolet Performance 12530283

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

Chevrolet Performance 12530283


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Chevrolet Performance 12530283 5.7L/350ci L31 Long Block Crate Engine with Vortec Heads for GM Trucks/Vans $2,069.99
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
  • Not for M

  • Specifications:

    Flywheel Included
    Wiring Harness Included
    Air Cleaner Included
    Carburetor Included
    Computer Included
    Crate Engine Cylinder Head Material
    Cast iron
    Cylinder Heads Included
    Distributor Included
    Engine Assembly Style
    Long block
    Flexplate Included
    Harmonic Balancer Included
    Intake Manifold Included
    Oil Pan Included
    Sold individually
    Spark Plug Wires Included
    Spark Plugs Included
    Throttle Body Included
    Timing Cover Included
    Valve Covers Included
    Water Pump Included
    Engine Balance
    Rear Main Seal Style
    Manufacturer's Part Number:

    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!

  • *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 - Chevrolet Performance 1996-2000 Truck 350ci L31-R Long Block Crate Engines & Install Kits is rated 5.0 out of 5 by 6.
    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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    • clientName_jegs

    I have a k1500 suburban, 5.7 L31 vortec with 256000 will this motor 1. Swap (I'm sure it will) with available parts on old engine. 2. Increase my original HP and torque. 3. Harm my new rebuilt HD tranny 4. Have the ability to buy a cam upgrade w/warranty.

    Asked by: True Texan
    This is a replacement L31 with the same HP/TQ as a new stock motor, all accessories will swap over and this will work with your freshly rebuilt transmission. cam change will void warranty.
    Answered by: Jegs Tech
    Date published: 2017-10-17

    will a 1995 5.7 liter distributor fit this block with a carb type intake ?

    Asked by: mechanicandy
    It should , it will depend on the intake a carburetor used.
    Answered by: Rusty B
    Date published: 2017-10-06

    what kit or parts would make the motor work in 95 c1500 truck ? thank you

    Asked by: mechanicandy
    You would need to get a carb intake, a tbi adapter flange and tune the ecu for the engine.
    Answered by: BrandonJ
    Date published: 2017-10-06

    Will this motor work in my 95 tbi truck ?

    Asked by: mechanicandy
    This engine fits 96-2000 model trucks only.
    Answered by: Jon Jegs Tech
    Date published: 2017-10-06

    I have a 74 c10 will it with stock 350 I also have aetelbrock intake and carb will it for I am in sure if is for a stock heads of vortex heads what kinda cam does it have hydrolic or roller ?

    Asked by: 74C10s
    It has a Hydraulic roller camshaft, the intake bolt pattern is different then the old sbc, so your intake will not work.
    Answered by: BrandonJ
    Date published: 2017-10-05

    Can you use a manual fuel pump with this engine? Is there a tapped hole in the block for a pivot ball for a Z bar?

    Asked by: firstoffscott
    This engine will accept a manual fuel pump as well as a clutch Z/bar.
    Answered by: Jon Jegs Tech
    Date published: 2017-10-01

    What is the hp and torque for this engine

    Asked by: Veteto2012
    255hp and 330tq is stock rating, now i have seen this engine make that at the wheels with a good tune and headers and intake.
    Answered by: BrandonJ
    Date published: 2017-09-27

    It says in description for 3/4 & 1 ton only, why wouldn't this work in a 1999 Tahoe 1/2 ton?

    Asked by: BigJohnson
    yes it will work but the 12530282 is the correct engine.
    Answered by: BrandonJ
    Date published: 2017-09-21
    • y_2017, m_10, d_18, h_21CST
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