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Horsepower: 405 HP

Torque: 406 LB-FT

Modern Technology Drives this Classic 350 Small-Block

Developed with contemporary technologies, including a high-rpm valvetrain, the ZZ6 Turn-Key offers a modern twist on the classic 350 Small-Block, delivering more than 400 horsepower and more than 400 lb.-ft. of torque!

The ZZ6 uses updated Fast Burn cylinder heads with beehive-style valve springs inspired by the LS engine family–a feature that enhances high-rpm capability to support more power than any factory-produced 350 engine ever installed in a Chevrolet production vehicle. The unique, tapered shape of the valve spring allows for the use of a smaller spring retainer, which reduces the
reciprocating mass of the valvetrain, resulting in better valve dynamics.

Like the ZZ6 Turn-Key, the ZZ6 Base features updated Fast Burn heads with beehive valve springs in an assembly that includes the intake manifold, distributor, waterpump, damper and flexplate. Additional components required for assembly.

INSTALLATION NOTES

• Comes with 12.750" externally balanced 153-tooth automatic transmission flexplate. Requires externally balanced flywheel for manual transmission.
• Requires fuel line to carburetor
• Some assembly and minor engine tuning required
• Not intended for marine applications

TECH SPECS

• Part Number: 19433042
• Engine Type: Chevy Small-Block
• Displacement (cu in): 350
• Bore x Stroke (in): 4.000 x 3.48
• Block (P/N 19431835): Cast iron with 4-bolt mains
• Crankshaft (P/N 12670965): Forged steel, shot peened
• Connecting Rods (P/N 10108688): Forged powder metal, shot peened
• Pistons (P/N 10159436): Hypereutectic aluminum
• Intake Manifold (P/N 12496822): Single plane aluminum
• Carburetor (P/N 19420445): 770 cfm Holley
• Camshaft Type (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 19417592): Fast Burn aluminum; 62cc chambers
• Valve Size (in): 2.000 intake / 1.550 exhaust
• Compression Ratio: 9.7:1
• Rocker Arms (P/N 19432297): Aluminum roller style
• Rocker Arm Ratio: 1.5:1
• Recommended Fuel: Premium pump
• Distributor (P/N 19432312): HEI
• Ignition timing: 36º Total @ 4,000 rpm
• Maximum Recommended rpm: 5,800 rpm
• Balanced: External
• Flexplate (P/N 14088765): 12.750"

NOTE: Distributor with melonized steel gear MUST be used with long-blocks and partial engines