ripping out my rocker

[Copytron]

So i just tore into my first repair on the new truck... on any truck. Here are some pics in case you see something i need to change/fix. I am wondering if i need to add some metal to the floor section right where the rocker meets it. Just where it curves down then back out towards the door. I'm sure i do cause there is nothing to weld to. Until i get the whole rocker and backing plate out i cant visualize how much i will need to add, and how far to the front the rust goes. So this post will probably take a while to unfold because i can only work on it a couple of hours a day for a while. Oh and yes that is spray foam.
j.