I am in the process of doing some welding on my van ,and I am working on replacing the sill panel that has the lower channel for the sliding door seal,and whilst cutting out the metal I noticed there was a dodge repair at the bottom of the b pillar so I though I cut it out and see what it's like behind .

What I am wondering is all that metal of the inside of the b post suppose to attach to the lower part,or is it just a case of getting an outer panel and welding it up?
Also is it possible the cut out and replace the corner tray in the engine bay without removing the wing?
All help greatfully appreciated thanks dazz