You can take that out, and deaden the inside, then make a false floor out of 3/8 plywood,and cover it with carpeting, and it should be fine??,or at least it worked for me on y 1990 240sx,and was cheap to do...All newer vehicles are made cheaply,to Crush/crimple in accidents/thus made out of cheap thin metal,verses old vehicles..Its nature of the beast..lol..You could get like a 1980 monte carlo,that is hard metal/steel framed, and put a system in that ,in which would sound amazing,and could be easier to make a great sq vehicle compared to todays tin thin buckets