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12568758
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12568758 - Chevrolet Performance 5.7L 350CID (LO5-K)

SKU: 12568758

Description:
For 1987-1995 Chevy/GMC trucks with 350 vin code "K" engine up to 7200 GVRW

Included Items:
Consists of engine block, crankshaft, connecting rods, pistons, piston rings, cylinder head assemblies (including valve train components), lifters, camshaft, timing gears and chain, timing chain dampener, front cover, harmonic balancer, oil pump, valve covers and oil pan, unless otherwise specified.

Fits:
1987 Chevrolet Pickup (RV1,2)
1987 GMC Pickup (RV1,2)
1987 GMC Suburban (RV1,2)
1987, 1988, 1989, 1990, 1991 GMC Suburban (RV1)
1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995 Chevrolet Pickup (CK1,2)
1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995 GMC Pickup (CK1,2)
1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995 Chevrolet Tahoe (CK1,2)
1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995 GMC Suburban (CK1,2)
1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994 Chevrolet Van (G1,2,3)
1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994 GMC Van (G1,2,3)
1995 Chevrolet Van (G2,3)
1995 GMC Van (G2,3)

Specs:
1986 and up 2 bolt main 1 piece crankshaft seal block(no mechanical fuel pump provision)
Nodular iron crankshaft
Powdered metal connection rods
Dished hypereutectic pistons
9.25:1 Compression ratio
High volume oil pump
Morse link type timing chain

Camshaft specs as follows:
Flat tappet hydraulic camshaft
Intake lift .382"
Exhaust lift .402"
Intake duration @.050-165.9
Exhaust duration @.050-174.8
Lobe center separation - 111.9
Camshaft mechanical specs
Intake valve opens @ -30.2 BTDC * Intake valve closes @ 16.1ATDC * Intake lobe centerline - 111.8
Exhaust valve opens @ 18.1BBDC * Exhaust valve closes @ -23.3 ATDC * Exhaust lobe centerline - 111.8

Cylinder Head Specs:
Casting number 14102193
Swirl port intake port design
64cc Combustion chamber
1.94" Intake valve 1.50" Exhaust valve
Valve spring part number is 3911068 (same spring used with the old 300hp 350 crate engine)
Installed height 1.70" Pressure @ Installed height is 80 LBS * Pressure with valve open is 267 lbs.
These springs are good for .550" lift but clearance between guide and retainer must be double checked before attempting.
7 Bolt exhaust flange
Center bolt valve cover flange
1987-1995 Intake manifold bolt pattern with center intake bolts canted @ 72 angle

This cylinder head is not a performance oriented cylinder head. It is classified as a high swirl head that was intended for good bottom end torque and fuel economy. The intake runner is restrictive because it has a ramp cast into the bottom of the bowl to promote high swirl.

Applications:
RPO - L05

Notes:
We do not recommend attempting to run this engine in a carbureted application because of the lack of a fuel pump provision. Special intake manifold is required

Warranty:
General Motors limited 3 year / 100,000 parts & labor warranty.