In fact, the 385 horsepower rating of the engine is complemented by excellent low-rpm torque, with the SP350/385 generating 405 lb.-ft. of torque at 3,600 rpm. It's all due to the high-flow, lightweight aluminum cylinder heads. They're based on the proven Fast Burn design, with large intake runners and 2.00/1.55-inch valves. The beehive valve springs enable greater high-rpm performance and durability, allowing the engine to rev higher to make the most of every cubic foot of air drawn through it.

As with all of Chevrolet Performance's Small-Block crate engines, the SP350/385 is built with a cast-iron block with four-bolt mains. It also features a forged steel crankshaft, an aggressive hydraulic roller camshaft and durable, high silicon pistons. In this value-driven ''Base'' crate engine package, it also includes the intake manifold, distributor, water pump, damper and flexplate.

SP350/385 BASE 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: Forged steel, 1-piece rear main seal
• Connecting Rods: Powdered metal
• Pistons: Hypereutectic aluminum
• Camshaft Type: Hydraulic roller
• Camshaft Lift: .474'' intake / .510'' exhaust
• Camshaft Duration (@.050 in.): 208° intake / 221° exhaust
• Cylinder Heads: 'Fast Burn' aluminum, 62cc combustion chambers
• Valve Size: 2.000'' intake / 1.550'' exhaust
• Compression Ratio: 9.6:1
• Rocker Arms: Stamped steel
• Rocker Arm Ratio: 1.5:1
• Distributor: HEI type
• Water Pump: Cast-iron, long-style
• Flexplate: 12.75'' diameter, 153-tooth
• Recommended Fuel: Premium pump
• Ignition Timing: 36° Total @ 4000 rpm
• Maximum Recommended RPM: 5800
• Balanced: External

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