I cut some of the piece off the rocker panel to see if I could get a better fit.
First, I don't know what kind of brain fart I had, and I'm pretty sure I was not smoking anything, but for some reason I decided to cut off the round end where the arrow is pointed in this pic. Doing so serves no purpose, and I did not even realize what I did until I was done.
I cut this part down a bit; I may need to cut it vertically a bit further down to get it in properly.
There is a large gap on either side of the rocker panel.
For the back I am thinking I can just bang the metal in to make it meet the rear door pillar. I am wondering if I did not line up the door pillar properly. When I look at it straight on, I see a slight difference, but it could be my mind playing tricks on me. Don't know if you can see it in the image.
I need to look at Mike's posts again to see how it's supposed to line up.