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SKU: 19331572

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.

  • Horsepower

    480 HP

  • Torque

    490 LB-FT

  • Tech Specs

    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

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