bgpzfm142;c-157815 wrote1. Heads involved with blown head gaskets or other overheating events should be taken to a head shop, put in an oven, and clamped / de-warped, NOT merely skimmed. Skimming the face doesn't un-warp the head.
2. 13mm rods interchange with 9mm rods; bearing sizes are the same.
They don't do the first one anymore, if it is done it's on iron heads.