149's on a 9.12" Cab Hot Rod was a perfect big pool board setup I had a few years ago.
159's are a little better, but more clunkier and bulky/heavy too.
On big decks at the front and back trucks the contour usually makes a board smaller than it's widest advertised size anyhow.
149's will be fine for you, do it up. If anything add 3 washers or so on the inside of the hanger side on your axles.
Good luck.