I'm not a pig pro but I've made a thing or two with steel.
To answer you question"yes anything is possible and that body can be repaired and be safe when you're done" but it won't be inexpensive and unless you are willing to jump in and do some of the metal work yourself it could be cost prohibitive.
To answer you question"yes anything is possible and that body can be repaired and be safe when you're done" but it won't be inexpensive and unless you are willing to jump in and do some of the metal work yourself it could be cost prohibitive.