I did it on my 72 Duster. It took two full weekends in my driveway but it wasn't that bad. A good mig welder and some metal tools was all I really needed.
It can be done at home.If the back half is rusted out and the 1/4,s are gone too,and every thing in the back is pretty much junk,and the big factor,you are going to put in a big HP motor,back halfing it a must,Mrmopartech