Need box design for 2 Soundqubed HDS315

[mgarcia1973]

It’s my first time ever posting on here and I’m hoping someone can help me by designing a box for my 2 soundqubed hds 315’s. I’m putting them in my 01 extended cab silverado, I have 60” x 25” x 20”, I would be willing to pay for a design if need be. I would like to have a center port if you guys think that would sound best if not then whatever would give me the best sound. 

Thanks in advance