Using angle stock cut to fit, I was able to line up with the "A" pillar and the rocker panel.
I needed to use 1.5" screws to mount all of this, and sometimes I had some difficulty getting the screws to line up with the threaded holes, given the depth of the stock I was going through. I could either enlarge the holes, which can make for loose pieces later, or I could taper the ends of the screws.
I elected the second choice. I used a grinder to taper the ends of the screws, then re-tapped the threads.
Without the tapered screws, I could not, for the life of me, get this last screw to grab threads. The tapered screws went right in.
With the angled stock in place, it looks good and has great surfaces for weather stripping.
I did the same thing on the other side. A future time I will develop the door seal along the under side of the door.