Get this "beast in a box" and then finish it to your satisfaction! GM Performance Parts has put together the ZZ502 Base as a convenient partial engine assembly. You get the big-block V8, four-bolt main muscle and just enough of the "finish work" to take the headache out of choosing parts -without missing out on the fun stuff!

The Base Engine, which boasts 4.47" bores and is stroked to 4.00", comes with aluminum, oval port cylinder heads with generous 110cc combustion chambers. Its big time valvetrain features 2.25" intake and 1.88" exhaust valves to keep it breathing easy! The crankshaft is forged steel and is paired up with a hydraulic roller camshaft for great performance.

All you need to add is attitude - and an intake manifold, carburetor, water pump, distributor and plug wires.

Specifications:

Engine Type:Chevy big block v8
Displacement:502
Bore x Stroke:4.47 x 4.00
Block :Cast iron with 4-bolt main caps
Crankshaft :Forged steel
Connecting Rods :Forged steel, shot peened
Pistons :Forged aluminum
Camshaft type :Hydraulic roller
Camshaft lift (in):5.27 intake / .544 exhaust
Camshaft duration (@.050 in):224 degrees intake / 234 degrees exhaust
Cylinder heads :Aluminum oval port; 110cc chambers
Valve size (in):2.25 intake / 1.88 exhaust; stainless steel
Compression Ratio:9.6:1
Rocker Arms :Stamped steel
Rocker Arm ratio:1.7:1
Recommended fuel:92 octane
Ignition timing:Base 8 degrees BTDC. 30 degrees total
Maximum recommended rpm:5800
Balanced:External

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