you really need to call Marcus at SC&C (number in the vendor list on tle left of your screen) He knows more about G-Body handling than anyone.. he can hook you up with what ever you need, at any budget, from tall balljoints and bushings to a complete G5/afx setup
there are guys that keep up with and outrun viper gts's with big power g-bodys and G5 suspension..
he used to post on
www.ssmonte.com do a search there on posts by marcus, there are pictures of some of the chassis braces he used to make (but stopped making because he apparantly felt that it was too simple to make and felt bad sellig them.. they work awesome though).. they are easy one afternoon jobs to make but eliminate most of the g-body squeaks... (I almost named my project "rattle and hum" for that very reason btw)