design for 2 BL 18's in expepdition

[rfcivic74]

i got design from you before for last car, last year sometime i think.
Now i got 97 expedition, running 2 bl 18's. the site says 5-10 cubes per sub. I am trying not to use all cargo area, but space i am workin with is 22" H x 48" W x 30.5"D. I came up with that being 16 cubes gross. I cant go any wider, but can go little deeper if needed and trying to stay around height of back seat. Looking for tuning around 32 hz. Subs up, port back

edited size of space

[80INCHES]

u seem to be on the right track....but make the depth 27deep and u should be fine... use slot port 160 square inches

80