Well if you wanna keep at least one seat in the back, theres enough room for a 10.6 cube box before you take out displacement and wood, and still have one person fit pretty comfortably... 35"W 31"H 17"D. Thats for a 2nd generation dodge just to let you know. I dont think itd look bad if you made the box clean. Thats what i plan on doing //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif