the box fittement isnt to much of a problem,89 cadillac deville,i wanted to go with 4 twelves but i figured why not go all out if i want to be in competions,it will all be in 1 box 4 holes in the front and four holes on top across the whole trunk,8 18 inch kicker cvx's what amps should i get and how to wire the 8 18s,dont post if your not going to help or be stupid,i really want to do this