In reply to Ian F:
I crammed it between the front seats. I have fixed back racing seats, but there was enough of a gap near shoulder height to get the end of the box lodged in the rear seatback. The other end of the box was pretty much touching the windscreen. Not a smart move, but I didn't really think about transporting the thing until I was standing in the parking lot wondering what the hell sorta mes I had gotten myself into.