take a picture of the rear area you have to work with so i can get an idea of the space you have to work with.That sub needs a BIG *** box! id recommend at-least 4 cubes closer to 5 for optimum. at this point Id go with a single 6" areo-port its going to save you space and have less resistance vs the slot port.
FYI soundstream is taking my techniques.. good job guys..
note the two different links you gave are for two different subs. one needs a SMALL box the other needs a LARGE box. i assumed that you have the driver in this link because of the box you stated you needed..
http://soundstream.com/manuals/AMP/Tarantula-T5.pdf