Well, in my case, the log I had was a full round log, probably cut a day or two before I got it.
It needed to get sawn up as soon as possible, as does any log.
Yours was sawn and stacked 8 years ago, so you are way ahead of the game.
Fryovanni is absolutely right. Leave it alone until you have a real solid idea what you want out of it.
Then, and only then, cut the pieces you need out of it. Cut them a little oversize, as it will still be likely to bow a little, even if it is thoroughly dry. Then let it sit a few weeks more before you true it up.
Believe me, I have been through this, getting all amped up about a big chunk of wood, and tearing right into it, only to end up with a bunch of little pieces of wood that would no longer work for the intended project.