63 Dart 4 door conversion to Pickup..

Been doing a lot of reading up on this type of a project and I will add in some extra supports. I was also toying with the idea of perhaps not a pickup but just extending the trunk by the amount I cut out. Almost like a pickup with a tonneau cover on it except it's the trunk lid. I project about a 30" removal of the roof between the back of the front door to the back of the rear door. After I weld in the rear back with window the car will still have a significant "structure" to it rather than someone trying to make a convertible out of a hardtop. Need to read up on this some more before cutting anything though..