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Chevrolet Performance 350 C.I.D. L31-R Long Block Assemblies 12530283

Get Free Shipping with Your Order over $99!

Engine Assembly, Crate Engine, Chevy 350, L31-R, Truck/Van, Each

Estimated Ship Date: Today Would you rather pick it up? Select Location

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  • The part NAL-12530283 has an additional core charge of $100.00 per item. You can receive a refund by returning a suitable old core. Please refer to the core return instructions included with the part or contact customer service for more details.

  • Order this item and get free delivery and handling on your entire order! Truck freight fees also waived on this item. Valid on orders shipped in the contiguous United States.

Manufacturer's Part Number: 12530283
Part Type: Crate Engines
Summit Racing Part Number: NAL-12530283

Engine Assembly Style: Long block
Crate Engine Cylinder Head Material: Cast iron
Assembled: Yes
Engine Balance: Internal/External
Intake Manifold Included: No
Cylinder Heads Included: Yes
Carburetor Included: No
Throttle Body Included: No
Distributor Included: No
Oil Pan Included: Yes
Valve Covers Included: Yes
Timing Cover Included: Yes
Water Pump Included: No
Harmonic Balancer 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.
Notes: This engine is not designed, nor intended to be used in any marine applications. Engines installed in vehicles registered and normally operated outside of the United States carry no warranty.
In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.
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Got a 1/2 ton, 3/4 ton, or other GM pickup with a tired, sick, or broken engine? Chevrolet Performance has exactly what you need. Their 350 c.i.d. L31-R long block assemblies are built up from 4-bolt main blocks with one-piece rear main seals. To this, Chevrolet adds a nodular-iron crankshaft, powdered-metal connecting rods, and hypereutectic aluminum pistons. You also get power-producing cylinder heads with 1.94 in. intake valves and 1.50 in. exhausts, and 64cc combustion chambers that yield a gas-pump friendly 9.4:1 compression ratio. This combination is paired up with a roller cam that has 0.414 in. of intake lift and 0.428 in. for the exhausts. Duration at 0.050 in. of lift is 191 degrees for the intakes and 196 for the exhausts, with 111 degrees of lobe separation. These engines come complete with an oil pan, timing cover, valve covers, and harmonic balancer. The long block assemblies are designed to fit 1996-2000 full size Chevy/GMC trucks and 1996-2002 Chevy/GMC full size vans.

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Most Helpful Reviews Review this Product

3 Customer Reviews for Chevrolet Performance 12530283 - Chevrolet Performance 350 C.I.D. L31-R Long Block Assemblies

Average Customer Review

5 Star

(3)

4 Star

(0)

3 Star

(0)

2 Star

(0)

1 Star

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Good Deal

Summit RacingSummit Racing Verified Purchase

Couldnt be happier to get my truck back and with a new AFFORDABLE engine! Wish it had a bit more power but for the price I cannot complain.

3 of 3 found this review helpful.

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Reviewer: STANLEY from LA

Date: April 15, 2014

Appearance
Ease of Installation
Price/Value
Quality

Awesome

Summit RacingSummit Racing Verified Purchase

Exactly as described 2,500 miles later runs great no noises has ran perfect since first start up. Could not be happier.

1 of 1 found this review helpful.

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Reviewer: DANIEL from MA

Date: September 02, 2014

Appearance
Ease of Installation
Price/Value
Quality

Chevrotet 350 C.I.D.L31 long Block

Summit RacingSummit Racing Verified Purchase

So Far so good it was shipped when they said it would be also arrived on time and sealed up.

1 of 1 found this review helpful.

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Reviewer: TOM from CA

Date: August 06, 2014

Appearance
Ease of Installation
Price/Value
Quality

Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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