GS,
Coming along nicely. One piece of advice I can give you from having gone through the same process on my truck: after you are done welding you will have to find a way to get some primer on the interior welded areas, including seams. The welding vaporizes any primer and if you don't get any onto the worked area, it will recommence rusting. In the Northeast, this has happened on my truck in a fairly accelerated manner, but even in Florida, especially if you live near the sea, you will see rust again in a few years if you don't figure out a solution to that issue. I was thinking that a dunk in a tank to re-etch, and then a very thorough epoxy primer session, using wands to get inside door pillars, etc. There's a place in Texas that does a completely non-toxic dunk treatment, and there's no acid involved or anything like that. I know it isn't close to you, but if you want to keep the truck a long time in good shape, I'd give it some thought.
My $0.02....