Several issues will have to be dealt with. I had doors on when welding up the the rear half of the cab to the front to keep the body line straight, so that is good. The REAL issue is that standard cabs fall back at the rear of the door, extending the cab I had to widen it in the rear 6" to keep the roof lines happy. This means I will have to flay out the bottom lower corner of the front doors (2"or so) to get them to line up nice. Of course I will have to completely build the rear suicide doors from basically scratch for the skins. And of course the constant battle in my head for the top intersection of the front and rear doors: square it off or keep the curves.