This ^. Also you can't really just drop forged internals in because there is a massive weight difference between forged and OEM. You will need to get the crank balanced for the new weight which I would HIGHLY recommend getting the journals micro-polished. Then you'll need to get the cylinder walls checked out because if there are any scratches/gouges then you'll need to get it bored which would tell you the size piston you need. All of this is an extended version of saying "Do it right the first time" it'll cost a little more upfront but save you a lot of money and heartache in the long run.