6x2x2? Dang dude, thats huge.
Most Boas average 5-8 feet long. With the occasional 9-10 footer to keep everyone guessing. 90% of Boas will comfortably live in a 4x2x18" as adults for life.
I mean, if you want to keep your Boa in something that large, thats your prerogative, but its not needed.
Good luck with your new Boa. They are tons of fun. Be sure and read up on them and do some studying. They are worlds apart from your Ball Python.