I think you should do 3.61 cubes and tune to 31.84.
Seriously? Why do you guys post 4 digit volumes and tuning? NOBODY is good enough to build something made of wood to 4 digit specs. Lol.
Do you not have enough room to do both subs on the same plane? It'll work the way you want to do it (read: AsCitiesBurns' trunk), but I'd rather see subs up. If you don't have the room though, one firing to each side is the best way.