would have a great team for a year or two, then they would start getting on each others nerves. Kobe and Shaq were able to remain teammates for a long time, but were constantly bickering with each other, LeBron and Bird both have egos too. But in the short term, I think you would certainly have a chance at beating me.
As far as LeBron being out of position, I tried to only pick from those in position, I thought about moving out Pippen for a second shooting guard, but decided to just keep it at their preferred position. LeBron has played enough PF though that I think its a fine place for him.