If you are going to play CLEV at the series price, it's probably better to just bet them on the ML in every game. They are going to be ML underdogs in every game except possibly GM 3. where they may be -1 or something like that. On the other hand, playing SA on the ML each game could be problematic since if they lose one, especially at home, you'll pay a big price for it.
My reasoning is such that in a 7 game series the best team is almost always going to win. Consider if the Spurs take a single road game in CLEV in all likelihood, CLEV would have to win this series in either GM 6 or a GM 7 on the road and that is highly unlikely. Consdier the major advantages in having the home court, a strong road record, the better players, the better defense, experience, coaching, etc....it's hard to imagine a scenario where CLEV could win this thing.
Of course, they could. They have won both meetings this year, they are riding a wave of momentum, they have Lebron James, and the 2-3-2 format of the NBA finals seems to help the underdog more than it does the favorite. It was not too long ago DET beat LAL in a series where they were huge dogs. Those are strong cases for CLEV no doubt. Even so, I still think the inexperience of CLEV and the fact that they play in the East is going to hurt them. Wash, NJ, and DET are no San Antonio. The quality and style of basketball in the West is far superior than that of the East. No way Lebron scores 25 straight points against this high quality of a team.
Going to play .5 units on SA -450 to win the series.