I am going to purchase the FSM for this engine before I disassemble and so I can read on how to service the cylinders. If all else fails I will have to bore the block out and sleeve it. Usually with aluminum blocks you warm them up to expand the metal. You take a sleeve with is a few thousandths larger then the cylinder bore which you freeze to contract/shrink the metal before you slide it through the cylinder bore. As they both return to room temperature it will basically wedge that sleeve in there. I havent reached this point of the project yet. I am about to purcahse a Haltech or Motec engine management and get it all wired and running first on the stock parts. Get all the base maps dialed in before I strip it back down.