I wouldn't even consider registering with the original VIN. What if the guy who has it has both the VIN and the paperwork but hasn't registered it yet, then some time down the road he does. Now you're in deep do-do. Just find another dash/VIN/paperwork. As for the door #s, doors got damaged, rotted, etc and swapped all the time !!
Agreed, I stated this earlier, it's just a "plain jane" RR, stick a "clean" titled VIN on her and start the resto, just be sure to remove/restamp the previous numbers
