Sounds like fun, but you may have a weight issue on the braces. I'm really not sure. Check to see what your single rack load rate is since you will be hanging off the top rack. It is going to take some time. 2-4 Boston Butts will take 18 to 24 hrs to reach an it of 180. As for as crisping the skin I think EVOO wil help you get a crisp skin. If you decide to do it, post pics. would love to see it. Good luck. CRG