cp-2016-engines-detail-ZZ427 480-masthead.jpg



480 HP

@6000 RPM



490 LB-FT


The classic L88 427 updated for the 21st century

Between 1967 and 1969, the legendary L88 was the ultimate expression of Chevy’s Big-Block power, combining a rigid iron cylinder block with lightweight aluminum cylinder heads and a single four-barrel carburetor. That raspy rat engine was rated at 480 horsepower, although the figure was generally thought to be on the conservative side.


Chevrolet Performance has recreated that classic Big-Block combination in the ZZ427/480 — including the 480 horsepower rating. Like the original, it features a forged steel crankshaft and high-flow, oval-port aluminum cylinder heads. We’ve upgraded the camshaft from the original’s mechanical flat-tappet design to a smoother hydraulic roller, which delivers great drivability characteristics and a broader rev range. A 10.1:1 compression ratio means it will perform great on pump gas, too.


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 engine that delivers the performance that built the big-block’s legendary reputation.


video gallery

Connect & Cruise Powertrain System

Connect & Cruise Crate Powertrain Systems provide factory-matched engine-and-transmission combinations that include specially calibrated controllers and wire harnesses designed for retrofit installations in older vehicles. Connect and Cruise packages are available for a wide variety of crate engines which can be paired with an automatic or manual transmission.

Tech Specs

Part Number: 19166393

Engine Type: Chevy Big-Block V-8

Displacement (cu. in.): 427 (7.0L)

Bore x Stroke (in.): 4.250 x 3.750

Block (P/N 19171620): Cast-iron with four-bolt main caps

Crankshaft (P/N 19170538): Forged steel

Connecting Rods (P/N 19211226): Forged steel 

Pistons (P/N 19171618): Forged aluminum

Camshaft Type (P/N 12366543): Hydraulic roller

Camshaft Lift (in.): .527 intake / .544 exhaust

Camshaft Duration (@.050 in.): 224° intake / 234° exhaust

Cylinder Heads (P/N 19211799): Aluminum oval port, 110-cc chambers

Valve Size (in.): 2.190 intake / 1.880 exhaust

Compression Ratio: 10.1:1

Rocker Arms (P/N 19210726): Aluminum roller style

Rocker Arm Ratio: 1.7:1

Distributor (P/N 19212081): HEI type

Carburetor (P/N 19170093): 770-cfm

Water Pump (P/N 19168602): Aluminum short-style

Spark Plugs and Wires: Included

Recommended Fuel: 91 octane

Ignition Timing: Base 10° BTDC, 36° Total

Maximum Recommended rpm: 6400

Balanced: Internal

Installation Guides

Find everything from the vital data about your engine’s capabilities to how to install it into your build.

Subscribe to the Chevy Performance enthusiast monthly newsletter.

Check out Chevrolet Performance product releases, feature car builds, and more.



Connect with Chevy Performance.

Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet Federal Motor Vehicle Safety Standards and emissions regulations and should not be operated on public roads. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle.

  • The Manufacturer's Suggested Retail Price excludes tax, shipping and installation. Individual retailer pricing may vary. Please see your local dealer or retailer for details.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.