How can I secure a false floor to my car? This is a 92 Mustang hatchback. I will be doing a spare tirewell box and also placing my amps under the false floor. I will be placing plexiglass over them so you can see them but the false floor will be covered by the factory carpet so no one can tell anything is in there. I have 2 JBL amps and will be getting either 2 IKPs, a RE SE, or a SS RL-p.