Dan is right on the money. You will need some tools to cut out the trunk floor and grind the welds. If you have a good air compressor, then purchase good quality pneumatic tools - Snap On or Ingersoll Rand. Otherwise, purchase good quality electric tools.
If your trunk floor is pretty rusty, I recommend having it sand blasted (or do it yourself) so you can really see what you have to work with. There are portions of the trunk floor that are welded to the frame rail under the trunk floor and you have the carriers for the fuel tank.
Pull the fuel tank and see what it looks like from the bottom.
Get a copy of Classic Industries latest catalog for the Camaro - it shows all the trunk floor parts that are available. I haven't seen the new Firebird catalog, so I am not sure if they are listed yet.
