1996 Regal suspension
 

I have a standard issue 1996 Buick Regal Custom with the 3800 engine. Overall this is a good car, but I'd like the suspension be a little stiffer. The front strut cartiges and rear struts have been replaced fairly recently, but the car still handles a bit too soft for me. Can the suspension be improved on these by installing front springs and struts for a Regal GS or perhaps parts from a Chevy Lumina LTZ? How about the transverse leaf in the rear and the rear struts? Are there any suggestions for the rear also? If anyone has tried this, I'd be interested in hearing about how it turned out.

Thanks,

Allen