ZZ427/480 Crate Engine

The L88 427 was the ultimate expression of  Chevy‘s production  Big Block  power, combining a rigid iron cylinder block with lightweight aluminum cylinder heads and a single four-barrel carburetor.  GM  engineers have recreated that classic, raspy rat engine in the  Chevrolet Performance  ZZ427/480  crate engine, but with updated components that enhance drivability and  performance.

This  Chevy  engine  is a modern take on the classic L88. The engine assembly features the latest-generation block casting with four-bolt main caps, an all-forged rotating assembly for exceptional strength and durability and a hydraulic roller camshaft instead of the original L88”s flat-tappet cam, for greater drivability and a broader  performance  range. It also features aluminum oval-port cylinder heads with 2.19/1.88-inch valves and a pump-gas-friendly 10.0:1 compression ratio.

Whether you”re building a ”69  COPO  Camaro  resto-mod  tribute, a modified mid-year  Corvette  or a  street-tire class winner, the  ZZ427/480  is the heritage-inspired  crate motor  that delivers the  performance  that gave the Chevy Big Block its  legendary reputation.

Important Notes:

• Requires addition of starter and fuel pump (not included).
• Recommended Transmission:  SuperMatic 4L85-E Four-Speed Automatic P/N 19300175
• Due to crate fitment, the carburetor is shipped in a separate box and needs to be installed by an engine installer.
• Clutch linkage bosses are drilled and tapped. When using cast-iron exhaust manifolds, lower head bolts may need to be replaced with bolts with shorter heads for clearance.
• Comes with an internally balanced 14”³ automatic transmission flexplate. Requires flywheel designed for internally balanced engines.
• Designed for  pre-1976  street  vehicles or any  off road  vehicle.
• Not intended for marine applications.

Note:  Distributor with melonized steel gear MUST be used with long-blocks and partial engines with steel camshafts, or engine damage will occur.

 

This part supersedes old GM P/N 19166393

Supersedes old GM P/N 19166393