has any one had to replace the fuel and brake lines due to premature rust from

What is your question?

just got this little gem and the brakes leak as fast as I can refill on closer inspection it has rusted the brake lines thrugh at the abs motor and the rear fuel location the leak seems to have rusted the rear sub frame member realy bad .. the close thing I can fugure is to replace with a Seville parts car it is the same onlt 8 inches longer am I screwing up and what problems can I run in to??