I know this comes off as blatant overconfident homerism, but if Dallas is going to win the series, their best odds are in 5 games.
I think things will be fairly evident early... pace, defense, etc. One of the Lakers' problems was the inability to stop the penetration/ kick-out 3 pointer, which really opened up the middle. If Dallas' quick paced offense gives Miami fits, then my prediction is possible. If Miami dominates defensively, as they did with Chicago, then Dallas will likely struggle.