The 427 rat in a box returns to GM!

There are few engines that conjure up images of greatness like the 427 Chevy big-block. New to the GM PerformanceParts lineup, the ZZ427 big-block crate engine brings back all of the good things that you remember about the 427 with afew modern new upgrades. With an updated cast iron block, a 10.1:1 final compression ratio, and an aggressive hydraulicroller camshaft, the ZZ427 offers you outstanding performance while still living on low octane fuel.
The legendary 427" big-block Chevy powered some of the most storied cars in the history of the high performanceautomobile.
This latest version holds true to that tradition, offering you a tough, 4-bolt main cast iron block with all aforged internal rotating assembly.
The top half of the engine is the same as the limited edition Anniversary 427 crateengine: oval-port heads that use 2.19" intake and 1.88" exhaust valves work with 1.7:1 aluminum roller rockers and a .510"intake/.540" exhaust camshaft.
The intake is a matching, high-flow oval-port aluminum piece that gets fed the air/fuel mixfrom a 870-cfm carburetor. An HEI distributor, aluminum water pump, spark plug wires, and a 14" flexplate round out thepackage.

Internally balanced, the ZZ427 will spin to 6000 rpm before it’s time for you to shift.The ZZ427 is an exciting trip back to one of the high points in the history of the Chevrolet big-block. With a conservative ratingof 480 horsepower and loads of torque, it’s still one of the best crate engines for just about any big-block application.



Part Number: 19331572
Compression Ratio: 10.1:1
Engine Type: Chevy big-block V-8
Rocker Arms (P/N 12361323): Aluminum roller style
Displacement (cu in): 427 cu in
Rocker Arm Ratio: 1.7:1
Bore x Stroke (in): 4.25 x 3.76
Distributor (P/N 19212081): HEI type
Block (P/N 12561353): Cast iron with 4-bolt main caps
Carburetor (P/N 19170093): 770-cfm
Crankshaft (P/N 19171620): Forged steel
Water Pump (P/N 19168602): Aluminum short-style
Connecting Rods: Forged steel
Spark Plugs and Wires: Included
Pistons (P/N 19171618): Forged aluminum Flexplate (P/N 12561217): 14 in
Camshaft Type (P/N 12366543): Hydraulic roller
Recommended Fuel: 92 octane
Valve Size (in): 2.19 intake / 1.88 exhaust
Valve Lift (in): .510 intake / .540 exhaust
Ignition Timing: Base 8° BTDC, 36° Total
Camshaft Duration (@.050 in): 211° intake / 230° exhaust
Maximum Recommended rpm: 6000
Cylinder Heads: Aluminum oval port, 110cc chambers
Balanced: Internal

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19329795 T56 Manual Transmission and

19329902 Transmission Installation Kit

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