rockford t2 enclosure

Hey I just bought a Rockford T2 and I have it in a sealed box right now that I used to have a w6 in. The T2 really does not sound that good in a sealed box and the it is not recommended to be in a sealed box. My question is does anyone have any opinions on a vented box that would sound the best for this sub.   It is a 12 in, its in a ford explorer so I have plenty of room to work with, and its hooked up to a JBL GTO 1201.11. As of now I'm thinkin I will make the box on this website: https://www.rockfordfosgate.com/scripts/rightnow.cfg/php.exe/enduser/std_adp.php?p_faqid=469&p_prod_lvl1=19&p_prod_lvl2=26&p_cat_lvl1=5&p_cat_lvl2=&p_search_text=469&p_search_type=2%3Afaqs.faq_id

but idk anything about tuning and frequency so I was just wondering if anyone had any opinions.

Where did you get that? If you look on the owners manual it says 2.0 cu.ft. and idk about hertz but it says FS(Hz)=31. If i just go ahead and build the box from the first post, would I need to have internal support cuz its a heavy ass sub. I plan on using 3/4'' mdf

   I got it at the fosgate site.............yes you can never have too much bracing as long as you account for the displacement of the bracing.....bracing is your friend.

so how do i account for the bracing? i have to find the volume of the pieces i use for support then increase the original size of the box by that volume?

That is correct.