888-748-4655 | 330-965-7146
7997 Market St.,
Boardman, OH 44512
Boardman, OH 44512
GM Chevy 350 Long Block Engine Includes: GM Chevy 350 Long Block Engine does NOT Include: Note: This engine is shipped dry and requires oil system to be primed and valvetrain adjusted prior to initial start up. Harmonic balancer used will need to be checked for exact TDC (top dead center) location and timing pointer modified/adjusted to correct location. Warranty:
• Fully GM assembled long block
• Stamped steel OE valve covers
• Oil pump, pick-up and oil pan
• Front timing cover
• 6” & 8” timing pointers for use with 2 O’clock mark balancers
• Block is drilled for drivers and/or passenger side oil dipsticks, plugs are included to plug unused dipstick tube hole.
• Oil Dipstick & Tube
• Mechanical Fuel Pump Push Rod
• Oil Filter Adapter and Bolts
• Harmonic Balancer Bolt & Washer
General Motors limited 1 year / parts only warranty. Click Here to view or download warranty form.
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Pace Performance Dyno Tested Chevy 350 260HP Turnkey Crate Engine
The 12681429 engine remains our most popular crate engine of all time! This is a great entry level replacement engine for older cars and trucks, and a great basic street rod engine. All of the parts in this engine, including the block, are Brand New!
Specifications:
Power: 260 HP @4300 RPM, 350 ft. lbs. of torque @ 3600 RPM
Displacement: 350 CID, 5.7L
Bore x Stroke: 4.00” x 3.48”
Compression Ratio: 8.5:1
Recommended Fuel: 87 Octane
Block: Cast Iron, 2 piece rear seal, 4-bolt main caps.
Crankshaft: Nodular Iron
Connecting Rods: Powdered Metal Steel
Pistons: Cast Aluminum
Camshaft: Hydraulic Flat Tappet
Cam Lift: .383” Intake / .401” exhaust
Cam Duration @ .050”: 194 deg. Intake / 202 deg. Exhaust
Lobe Separation: 112 Degree
Cylinder Heads: Cast Iron, 3/8” pressed in rocker studs.
Combustion Chamber: 76cc
Valves: .194” Intake/ 1.50” Exhaust
Rocker Arms: Stamped Steel, 1.5:1 Ratio
Valve Springs:3911068
Balance: Internal
Maximum GM Recommended RPM: 5100
Ignition Timing: Base 10 degrees BTDC, 32 degrees total
Cylinder Head Notes: 7 Bolt style Exhaust Flange Standard, 85' and prior intake manifold bolt pattern. Perimeter bolt style Valve Covers. This head is very similar to the old #882 castings from the 1970's.
Direct Fitment OE Applications:
RPO - LM1, LS9, LT9, 350L, 350Y
Fits:
1975 - 1985 Chevrolet Pickup (CK1)
1975 - 1985 GMC Pickup (C1)
1975 Chevrolet Blazer (C1)
1975 GMC Jimmy (C1)
1975 Chevrolet Van (G1)
1975 GMC Van (G1)
1978 - 1980 Chevrolet Van (G2,3)
1978 - 1985 GMC Van (G2,3)
1979 - 1985 Chevrolet Blazer (CK1)
1979 - 1985 GMC Jimmy (CK1)
1979 - 1985 GMC Suburban (CK1,2)
1980 - 1985 Chevrolet Van (G1)
1983 - 1985 Chevrolet Caprice Classic (B)
1983 - 1985 Chevrolet Impala (B)
1973 - 1980 Chevrolet Corvette (Y)
1984 - 1985 Pontiac Parisienne (B)
Notes: 4 bolt main caps, two piece rear main seal. Replacement timing pointer tabs p/n 3991435 or 3991436. Includes valve covers, front timing cover, oil pan, new oil pump. Camshaft is 12364051 (327cid/300hp profile). Flat tappet lifters. Machined fuel pump boss.
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