Hello and
to the site !!
Your d-side floor/rockers look almost identical to mine, and I am in the middle of replacing them as well. I did not cut my floor pan right for the patch so I am waiting for a new one to arrive.
You certainly have a vision to do what you have done already!
Shortening the bed is truely an undertaking I am not sure I would attempt, congrats on yours, looks like it turned out really good!