This came out of my stock 2010 zr1 with almost 5,000 miles. the pistons, rods and crank from what I see are all in perfect condition but on of the sleeves has multiple "scratches" not cracked and can be bored out or strocked for a project. i asked a local shop here in AZ if the sleeve could be bored out or not ? he said its a tiny problem that could be fixed for $500. Im asking $3900. i can ship but the buyer has to pay for the shipping. if you have any questions please call @ 6617707776. AZ