If you got the bucks to spare, buy the rust free cab and sell off the parts you don't need. You could end up making money on the deal if you account for all the time and consumables that it will take to fix the rust bucket.
1953 Chevrolet 3600 Fried Green T'mater (Vern) In the Stovebolt Gallery Caution: Political Statement Man who runs in front of car gets tired, man who runs behind car gets exhausted.