i cna design something for you. i've tested several alignments and sizes of boxes in suvs.
typically sub up port back, centered slot port low profile does the best for daily. what type of FR(frequency response) would you like? those vechiles tend to peak around 42-46 with a shallow roll off below that and a fairly sharp roll off over 50hz. you want something that is flat and slams on all types of music are you want a sick street beat? or you want killer lowend?