If you are talking 2 door sedan, then yes. Lengthen the doors. buy EMS quarter repairs and move the B-pillar.
2 door coupe is a different animal. Trunk lid is different. Trunk hinges on the outside rather than inside. Slanted B-pillar. Different roof line.
My project journal has some good photos of what needs to be done to the floor and quarter area in front of the rear fender. If I were you, I would probably forgo roll up quarter glass. Glue the glass in. If I had it to do over again and knew how much time everything was going to take, I would have probably glued mine in and I had a set of window boxes to start with.