After all displacements I get you at roughly 3.9 cuft tuned to 34 Hz. This will work for a daily application... although I am not a fan of long skinny boxes. There are no nasty peaks and your vent velocity even at 1300 watts is around 5% mach, at max.
They use to recommend 3.5 cuft tuned to 35 Hz for daily for those drivers. Just for curiosity sake, is it a dual 2 or quad 1?