ZL1 3946052 spotted today at Pomona Swap Meet

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ZL1 3946052 spotted today at Pomona Swap Meet

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02-05-2004, 03:34 AM

RPZ28

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Re: ZL1 3946052 spotted today at Pomona Swap Meet

rpoz11
You are correct, sleeve od's are different. The blocks were the same when they were casted, but as you mentioned the aluminum cores were bored out alot bigger for the 4.440 application. The 4.250 ZL-1 could only be bored saftly to 4.300. Chevrolet made these blocks from 1969 to 1972. Hope this helps.
Ron

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