Help with ported box design for dc lvl 4's

[Never2Loud931]

Alright guys I've got two 12" lvl 4's and I'm hoping someone can help me out with a nice ported design, I've made a few using the re calculator but I see many people saying it's inaccurate. The max dimensions are 30"wide x 20"deep x 16"tall if I put it in through the back seat. However if I put it in through the trunk opening I can fit 36"wide x 12-14"deep x 16"tall. I do not personally have a preference of slot or areo port, what ever works best. I would also like a double baffle and I'm looking to be tuned around 30-33 Hz. Thanks for any help!