Can someone clarify for me how a stock H22A sleeve is different from a B or D series sleeve? Can these sleeves be overbored if so how much? I've been told the sleeves have a coating on the cylinder walls is this true? I would like to know what alternatives to resleeving this block are out there? Also has anyone every cryo treated stock pistons and rods and made 400 to 500 horse safely? Alright thats enough questions to drive anybody nuts anyways someone who knows the answer to any or all of these questions should get back to me ASAP thanks l8r