Another thing to consider with sleeving all of the holes, is to have the mains align bored or honed. There can be some block/main distortion from all of the added stresses (sleeve interference fit). If you did this in my shop, with or without the sleeving, I would be recommending the align hone anyway. Sleeve first, then align hone to establish main bore roundness and alignment, then square (deck) the block. Once that is done, bore the sleeves so that the holes are perpendicular to the deck.