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Chevrolet Performance ZZ427/480 Big-Block V-8 Crate Engine


Chevrolet Performance

Model #19331572

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.

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
Proposition 65

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