I bet you can hover for a few seconds, but you wont be able to control it!!!! They plane is a pig already, no control surfaces to aid it and lastly, its not meant to fly tail heavy.....It'll be hell keeping it in the air!! Good luck but my bets are on a short uncontrolled hover that may last a couple of seconds. If at all possible i would love for you to prove me wrong--(p-51 in a hover would be reallly cool but..................)Good luck, but what I'm guessing will happen is that you will have a really powerful mustang!!
have Fun
Nealio