For those that didnt know the official GM....
Unvieling of the Z06 was today. You can now go on several actual GM websites and get some info. They are feeding into them here and there.
Everything that was previously posted recently was right on. It IS a 427. Now I just need the part #s of the block and crank
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if it's cheap & reliable, it ain't fast, if it's fast & cheap, it ain't reliable, if it's fast & reliable, it ain't cheap