Well, as promised I thought I would share my story on cab
corners and floor.This to date is by far the hardest thing I have done. Not
because it was so hard, just because I never welded or did any body work before.
You be the judge. Here is what I started with. 
As you can see the floor was just about gone. In this next
picture, I don't know if you can tell how bad the corners were, but I could
shake pieces from the corners. 
The first thing I did was take measurements and have the local
machine shop cut me some 16 guage metal for the floor and then I ordered my
cab corners from Chevy
Duty . I spent about three nights practicing with my new Lincoln 175 welder
before I even had the courage to start. Here I go....
I used a cutting wheel and cutting torch to cut out the bad
spots. 
The machine shop did a pretty nice job cutting this out. 
Nice fit. Will weld in later!
Now the fun part..Cab corners. I think I did this the hard
way, but I like to try to do most of the work myself. I think this gives me
a better feel for the truck and if such a thing doesn't sound to corny, it
helps with bonding. Here is where I started. 
As you can tell, I had the cab blasted and in primer. I took
measurements and crossed fingers, took a deep breath and started cutting with
the wheel. I had to trim alot to make it look decent and cut down on body
work. 
I then tacked the corner into place skipping about 2 inches
between tacks. I then went back and made the best bead I could. Then it was
time for this. 
I smoothed the rough edges with a grinder, as you can tell
from other corner that I needed to smooth alot. 
Then it was time for the filler. This was my first time with
bondo also..Learned alot..The less you use, the less sanding. I sanded alot.
But in the end I think the corners came out great for a rookie. 
By now I had bleed, cussed once and increased arm size from
all the sanding and body work and had not even made a small dent in things
that needed to be done. So here I went again. 
I found out that the hours spent sanding and redoing is
long, but well worth it. 
I think that is about all for this page. I do want to share
this with you. 
I was proud of the cab corners, not because they where the
best professional job in the world, but because I did them. If you are reading
this and thinking about doing something, I recommend thinking hard about
it, then jump in. Have fun.