It's an epic amount of work. I would only attempt this if I were a very good metal doctor. I personally would try to fix the rust free wb.

Are you able to post up pics of the vans?

Have you done a resto before? Not having a go but I would hate to see you get stuck. I have been there...
http://www.mysandman.com.au/forums/a...&d=1281796466\
}I ended up crushing both