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Chevrolet Performance 350 C.I.D. 9.4:1 Truck Long Block Crate Engines 12681432

Crate Engine, Chevy 350, L31, Each

Estimated USA/International Ship Date: Loading...Processing Tomorrow INTERNATIONAL Customer Options

  • Order this item and get free shipping and handling on this item! Truck freight fees also waived on this item. Applicable shipping fees will be charged, if required, on additional items added to the order. Valid on orders shipped in the contiguous United States.

Brand: Chevrolet Performance

Manufacturer's Part Number: 12681432

Part Type: Crate Engines

Product Line: Chevrolet Performance 350 C.I.D. 9.4:1 Truck Long Block Crate Engines

Summit Racing Part Number: NAL-12681432

Actual Engine Displacement: 5.7L/350

Engine Assembly Style: Long block

Crate Engine Cylinder Head Material: Cast iron

Assembled: Yes

Engine Balance: Internal/External

Cam Style: Hydraulic roller tappet

Rear Main Seal Style: 1-piece

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

Quantity: Sold individually.

Notes: Replacement L31 engine with an engine code R. This engine has no mechanical fuel pump provision.

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

Calculator CFM Calculator

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. truck long block crate engines are built up from 1996-2002 style 2-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 Vortec 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 exhaust. Duration at 0.050 in. of lift is 191 degrees for the intake and 196 for the exhaust, with 111 degrees of lobe separation. These long block crate engines come complete with an oil pan, timing cover, valve covers, and harmonic balancer.


Questions & Answers Ask a Product Question

I currently have a 1995 C1500 with a 305 TBI, will this 350 work and not have to do any modifications as far as A/C, P/S and all other accessory brackets. Will all holes match up for brackets. Will this drop in as a replacement engine?? Thanks

Asked by DAVID on March 28, 2018


Thank you for your question. The Chevrolet Performance 12681432 crate engine is not designed for use with throttle body fuel injection. However, we do offer a part number 12681430 that will fit your 1995 Chevrolet C1500.

Summit RacingSummit Racing Answer - June 08, 2018

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does this block have a fitment for a crank sensor, a fitment for oil cooling lines to drop straight in a 1997 gmc 1500 ? and will i have to do a brake in period since with zinc oil since it is a new block with new internals ?

Asked by BRETT on October 01, 2018


Roller lifter engines do not require break in oils as such. The problem has been the older engines requiring extreme pressure wear protection to the cam and lifters especially during break in because they had flat lifters.

GERALD from MT answered on November 09, 2018

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Will this fit as a direct replacement for a 1999 Chevrolet Suburban c1500?

Asked by JAY on October 27, 2018


If it is an L31, 5.7 vortec motor yes it is.

JEFFREY from TN answered on October 29, 2018

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Does this engine come with press in or screw in valve spring studs?

Asked by BOBBY on March 14, 2019


press in

DAVID from New Zealand answered on March 19, 2019

Answer This Question

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Some parts are not legal for use in California or other states with similar laws / regulations

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