Can a burnt frame be reused?

[D13]

I tried search but really didn't find what I was looking for.
I have decided to build a truck 'my way'. One of the components of this is 4wd. I have or can easily get access to everything I need except a frame, cross members, and front suspension hangers. All of my 2wd frames are 1/2 ton and as I researched the bending moments indicate that the 4wd frames are stiffer and seem to be the same 1/2 to 3/4. Which leads me to my question.
Very local there is a 1/2 ton 4wd that went through a fire, bad enough that there is no paint on the cab or bed sides, no interior, etc. However it is complete, and since I would be totally redoing the frame on whatever I bought, removing the toasty body is not an issue.
Can I use this frame for my build?