here is a thread for a stretch cab on a trailblazer where the doors are extended instead of extra behind the doors. it would look better than adding the material behind the door if not going for enough stretch to add a window. my opinion only. the issue becomes the door skin I would think. the door skin is tapered on the body line front to rear so you may have to fab a new skin. not the end of the world though. the rest of the door stretch would be pretty straight forward if you have the skills to do the other part of the cab and frame swap. haha.
I cut my dash on each end but then the vents need to be made smaller and the headlight switch needs a revamp. not that far yet as I have other stuff on my plate right now.
http://67-72chevytrucks.com/vboard/s...d.php?t=608904