I wanted to do exactly what you're doing. I just can't find a set of doors to do it with. Well, not a set of salvaged doors anyway. I only want to do the back doors, and don't want to pay msrp for doors that I'm going to cut up, weld, grind, etc. I don't care if the top half is damaged, if the windows are broken, or what color i find, since I'm chopping the top half off and they'll need painted. I should be able to find a set eventually.
Looking forward to seeing yours. Let me know if there's anything crazy I should know about for when I finally find a set of rear doors to modify.