I ran chase tubes 2 1/2 " plastice electrical conduit. I only ran 1 tube. and I wish I put 2 tubes in. I did not put my gas line or steer cable in the tube either.
I then put my new floor in.
I thought the tray trapped alot of dirt and water, causing everything to corrode. Also, now all my cables, etc are hidden and come out the side boot.