Seems like this topic come up every so often,was considering it at one time for delivery,glad I didn't,after I looked it all over.Maybe someone who has done it can add to it.
Difference in wheelbase between original and donor,will you have to shorten or lengthen frame
Body mounts to new frame what will it take to mount body to frame
How much floor will you have to redo for the difference in arch of frames
Trackwidth difference between the two
Gas tank
Remake or rebend inner front fenders
Remake supports for front clip
Radiator mounts and width
Front or rear steer
Experience in taking on the task