Are you planning to house a BP in there? If so, make sure there are plenty of hides (i.e. not just two). It would probably also help to add some vines and cover 3 sides of the tank. That much space could make a BP pretty nervous.

Also make sure you cover the crack(s) with something so that there's no possibility that the snake could cut itself. We had a tank crack on the bottom. I taped it up with packing tape, put down newspaper, then a piece of plastic pegboard cut to fit the bottom of the tank, then I put down the substrate.