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INSTALLATION NOTES:
- Holley 670-cfm four-barrel carburetor, starter, fuel pump air conditioning pump, alternator, front-end accessory drive kit, included but not installed on engine
- Comes with 12.750' externally balanced 153-tooth automatic transmission flexplate. Change to the externally balanced flywheel for manual transmission applications.
- Requires fuel supply line from the fuel pump to carburetor
- Not intended for marine application
Engine Break-In Procedure
Use conventional or break-in oil (non-synthetic) for the first oil change, be sure to check the oil level in the engine and prime the oil system with an engine priming tool.
Engines with flat tappet hydraulic cams only - Run the engine between 2,000 and 2,500 RPM's, with no-load on the engine for the first 30 minutes. This is critical to breaking in the camshaft.
Drive the vehicle with varying speeds and loads on the engine for the first 30 miles. Be sure not to use a lot of throttle or high RPM. Run five or six medium-throttle accelerations to about 3000 RPM (40 to 50 MPH), then letting off in gear and coasting back down to 20 MPH. Run a couple of hard throttle accelerations up to about 5000 RPM (55 to 60 MPH), then letting off in gear and coasting back down to 20 MPH.
Let the engine cool and change the oil and filter using conventional (non-synthetic) oil and check the coolant level, top off if necessary. Drive the next 500 miles normally, without high RPM's (below 5000 RPM), hard use, or extended periods of high loading. Change the oil and oil filter again using conventional (non-synthetic) oil. Keep an eye on oil level during the first thousand or so miles.
It would be suitable to use synthetic motor oil after the second recommended oil change and mileage accumulation.
809-19419993 supersedes 809-19418190
Power, Durability and Ready To Run!
Chevrolet Performance's line of Street Performance engines offers great power at a great value – and the latest is the SP350/357. It leverages the strength of a strong rotating assembly secured in a brand-new block with four-bolt mains, and matches it with modern valvetrain technology to support great high-rpm capability.
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Economical Vortec iron cylinder heads deliver excellent airflow, while the latest intake manifold technology and a new hydraulic roller camshaft optimize airflow to push 357 horsepower and more than 400 lb.-ft. of torque! Better still, the engine is built with a durable rotating assembly set in a brand-new block with four-bolt mains. That's a feature you won’t find on most rebuildable cores.
This SP350/357 Turn-Key package comes complete with the distributor, carburetor and balancer installed. The starter, fuel pump, air conditioning pump, alternator, front-end accessory drive kit and more are also included, but not installed for shipment purposes.
SP350/357 TURN-KEY TECH SPECS:
- Engine Type: Chevy Small-Block V-8
- Displacement: 350ci
- Bore x Stroke: 4.000'' x 3.480''
- Block: Cast-iron with four-bolt main caps
- Crankshaft: Nodular iron, 1-piece rear main seal
- Connecting Rods: Powdered metal
- Pistons: Cast aluminum
- Camshaft Type: Hydraulic roller
- Camshaft Lift: .473" intake / .473" exhaust
- Camshaft Duration (@.050 in.): 215° intake / 223° exhaust
- Cylinder Heads: Vortec cast iron, 64cc combustion chambers
- Valve Size: 1.940'' intake / 1.500'' exhaust
- Compression Ratio: 9.0:1
- Rocker Arms: Stamped steel
- Rocker Arm Ratio: 1.5:1
- Intake Manifold: Dual plane
- Carburetor: Holley 670-cfm 4-barrel
- Distributor: HEI
- Recommended Fuel: Premium pump
- Ignition Timing: 32° Total @ 4000 rpm
- Maximum Recommended RPM: 5600
- Balanced: External
- Flexplate: 12.750"