looked at the car engine suffix codes which are two or three letters, but no factory installed blocks start with X as the first letter. There was an EX and other codes, just no X_. anyway, there are lots of codes on chevies, so get us a block casting no., date code, assembly code, engine suffix codes, and I can help you out.
Last edited by engineer; 10-10-2007 at 02:56 PM.
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