Need info about 3 inch front key and 3 inch rear spacer level lift
 

Hey all,
I am buying a torsion key and rear spring spacer level lift kit.
I have been told by the manufacturer that to install this I will need taller/longer rear shocks. I am curious if this is true, or for right now can the shocks I have now work? And if/when I get the rear shocks that are longer length, which ones should I get or where should I get them?

I have heard that you do need them, and you dont but they will be extended to the max.....? So of course I am curious.... If I can get away with the springs I have now working that would be great

I currently have a 2003 with air ride, which is going to have the spring conversion swapped when I do the lift.

Any comments would be appreciated