ssa gcon box

[monoxide]

so i am thinking of getting some ssa gcon 12s for my truck i dont really want a prefab box even tho one i heard today sounded good with 1 15 in it. but the box i drew up in my head before i really measured any thing in my truck(04 f150 xlt super cab). the box will be built out of 3/4" mdf and prolly doubled up on top or fiber glassed so the subs sit flush. if my math is right it should have 6.46376 cubic feet before sub displacement and 6.16376 cubic feet after sub displacement. it should be tuned to 32hz if ever thing is right.

here are all the measurements i have of it.

Box Dimensions for SSA Gcon 12" x2

36" width x 19" height x 20" depth .75" mdf = 6.46376 cubic feet before sub displacement

6.16376 feet after sub displacement

slot port =

Port width 20" x port height 2" x port length 11" = 32hz at 6.46376 cubic feet.

and a rendering in sketch up. its really rough but gives the idea.

also should i go with the slot port like i have drawn up or should i do a round port? let me know what you guys think.