Is this 68 Dart worth fixing?

I am looking at a 68 dart. it has a roll down rear window but a squared of rear quater glass. never seen one like this. It is DEFINATLEY a dodge dart.I have seen 68 scamps and valiants with this quater glass but not a 2 door dart. Anyway does anyone know if this car ws available with any good motors I would like to clone a GTS but I dont wantto be way off the mark with that quater wndow....HELP PLEASE