Well I bought the 89 Burb...now I have to fix the body

[seanu]

I picked up the 89 Chevy Suburban 4X4 this past weekend that I was looking at buying. Runs great (4wd works great) and the interior is in very good shape, and it only had 86,000 miles. only $1,750...

Now here's the bad part, the truck originally came from NJ and the lower portions of the body and everything underneath has rust, and in some spots very heavy rust through.

Here's a list of what is toast on the body..
Front outer fenders
Front innner fenders
rocker panels (both inside and out)
Before and after rear wheels
The inside rear wheelhouse (both sides)
Several of the floor cross braces
Tailgate
Tailgate hinge panel on body

The frame and running gear also have a heavy layer of rust, but seem to be still solid.

And the wierd thing is, that the floor underneath is solid, but the cross braces are rusted out...why's that?

So, I know I can buy fenders (inner and outer), the rockers, the patch panels for the outside rear fenders and the tailgate......but....How do I fix the floor cross braces and the inside rear wheelhousings? Are the rear inner housings on the burbs the same rear wheelhousing for a pickup bed?

Any ideas?......thanks, oh, and I'll post some photos later tonight if it's not raining when I get home..