I've been told GXP stuff is a direct bolt on for 97-03's and requires a new spindle for 04+ due to the e-brake.
Then in the front 04/05 LCA's dont have ability to run old sway bars. But 06+ does because of the old style LCA setup.
The question is: Does the different LCA/Swaybar setup apply to the GXP's for 05 as well?
I thought the GXP has square tubed trailling arms?
"Flip" did a complete write up (including pics) on the GXP brake install for the 04+ GPs over on GPONA.
He's member here (onebadassgtp) , maybe someone can get him to post it over here.