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

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

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

Click here for more information about Chevrolet Performance 12530283 - Chevrolet Performance 350 C.I.D. L31-R Long Block Assemblies

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


Part Number: NAL-12530283 More Detail...

Estimated Ship Date: Today


  • Core Charge

    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.

  • Free Shipping

    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.

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