Joe-x need your knowledge

[99blazer]

I need some help from joe x. I designed a box for 1 sundown sa 8 v2 and I need to see what you think of the box I designed . its 13h 9w 20d with two 2" round ports at 16" each tuning it down to 35hz which is recommended by sundown. I was seeing if you could design a box with a slot port the max dimensions are 15h(he preferred it to be a little bit shorter) 9w(this is already a super tight fit)20d and maybe you could suggest port up or toward the back or toward the front. also this is going into a 89 ford ranger single cab