Engine - GM (19433041)

CHEVROLET PERFORMANCE'S ICONIC 350-BASED "ZZ" ENGINE FAMILY CONTINUES THE LEGACY
Chevrolet Performance's new ZZ6 delivers more power than any 350 Small-Block ever installed in a production vehicle. Rated at 405 hp and 406 lb.-ft. of torque, it derives its range-topping performance from unique, lightweight aluminum cylinder heads that enable optimal airflow at high rpm.
The cylinder head casting is based on the proven Fast Burn design, with large intake runners and 2.00/1.55-inch valves. Beehive-style valve springs deliver greater high-rpm performance and durability. Their egg-shaped profiles have less reciprocating mass in motion, require less spring pressure for greater valve control and handle valvetrain stresses more efficiently. They allow the ZZ6 to rev higher to make the most of every cubic inch of air drawn through it.
The ZZ6 also uses an aggressive hydraulic roller camshaft that supports the engine's high-rpm airflow capability while maintaining excellent low-speed drivability. This Base crate engine kit includes the intake manifold, distributor, water pump, damper and flexplate - and the distinctive, racing-inspired valve covers that distinguish this crate engine as the latest in the ZZ legacy!
TECH SPECS
Part Number: 19351532
Engine Type: Chevy Small-Block
Displacement (cu in): 350
Bore x Stroke (in.): 4.000 x 3.48
Block (P/N 10243870): Cast-iron with 4-bolt Mains
Crankshaft (P/N 12670965): Forged steel (shot peened)
Connecting Rods (P/N 10108688): Forged powder metal
Pistons (P/N 10159436): Hypereutectic aluminum
Intake Manifold (P/N 12496822): Single-plane aluminum
Carburetor (P/N 19170093): 770 cfm Holley
Camshaft (P/N 10185071): Steel hydraulic roller
Valve Lift (in): .474 intake/.510 exhaust
Camshaft Duration (@.050 in): 208° intake/221° exhaust
Cylinder Heads (P/N 19300955): Fast Burn aluminum; 62cc chambers
Valve Size (inches): 2.000 intake / 1.550 exhaust
Compression Ratio: 9.72:1 nominal
Rocker Arms (P/N 19210724): Aluminum roller style
Rocker Arm Ratio: 1.5:1
Recommended Fuel: Premium pump
Distributor (P/N 93440806): HEI
Ignition timing: 36? Total @ 4,000 rpm
Maximum Recommended RPM: 5,800 rpm
Flexplate (P/N 14088765): 12.750"
Balanced: External
INSTALLATION NOTES

• Requires four-barrel carburetor, spark plug wires and additional components to complete assembly
• Comes with 12.750" externally balanced 153-tooth automatic transmission flexplate. Requires externally balanced flywheel for manual transmission.
• Requires fuel line from fuel pump to carburetor
• Designed for pre-1976 street vehicles or any off-road vehicle
• Some assembly and minor engine tuning required
• Not intended for marine applications