2004 CTS suspension option question
 

I have a 2004 CTS with FE3 sport suspension. I am wanting to replace worn out shocks /struts with FE1 soft ride suspension. Are there any issues with doing this.? I have found dimensions for the FE1 soft ride shocks / struts but cannot find any dimensions for the FE3 sport suspension shocks / struts. Is it fair to assume these would be the same dimensionally and the only difference would be the ride.? I would be grateful for any information that would help me make my decision. Thanks, John