The great debate

What do they exactly to I know they rise the car but how and it that all I need I am going to need to rise the car for the look and to fit the new rear wheels and tires[/QUOTE]

If you are using air shocks to fit your wheels and tires, you are asking for trouble. A small leak that lowers the shocks enough to hit - bad. Too full air shock that blows up on a hard pothole hit - very bad. If your tires don't fit without the air shocks, it would be foolish to try and make it work with air shocks.