1965 Valiant
I understand the emotional attachment. But it's not going to be an easy project, you should put a pen to it and see how much you are willing to spend. Engine, trans, frontend, interior, metal work, paint....etc... When you are done you might be able to get 5K for it....and that will be on the top end. But it is your grandpa's car and would be great to get it back on the road and when you are done you probably would never want to get rid of it. But a running driving 4 door Valiant would probably cost you 2K.