Page 202 of GM Performance Parts 2006 Catalog by GM Parts Direct

ZL1 Aluminum Big-Block (front) ZL1 Aluminum Big-Block, Four-Bolt Mains ZL1 Aluminum Big-Block (rear) 200 ZL1 ALUMINUM BIG-BLOCK The ZL1-optioned 69 Corvette and Camaro were without question two of the rarest musclecars ever produced. The massive ZL1 427 aluminum big-block under the hood elevated these cars to instant classics the first day they hit the streets of America. Now, GM Performance Parts has re-introduced that same legendary aluminum block from state-of-the-art materials to our own flawless, blueprinted dimensions. Buy the ZL1 aluminum big-block, and you can build your own supercar! See chart on page 196 for complete specifications. ZL1 Aluminum Block Technical Notes: 356-T6M Aluminum block Steel 4-bolt main caps, 16 splayed on center 3 mains, dowel located Siamesed cylinder walls Centrifugally spun cast iron sleeves 4.240" finished bore 4.300" max bore 4.375" max stroke Standard deck height (9.800") Two-piece rear main seal Oil and water plugs are AN O-ring style Tested to 800 horsepower! 12370850 ZL1 Aluminum Big-Block 4.240" finished bore 4.300" max bore 4.375" max stroke Use sleeve P/N 12480035 (see page 205) CHEVY BIG-BLOCK V-8

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