I'm just finishing a somewhat involved big brake upgrade for my CSX 4000 Series. All new Baer 4-piston calipers and big rotors with Wilwood parking brakes. This setup just BARELY fit my 15" wheels!
Took some trial and error to get where I am now for the park brake solution and still have a little more to do to complete them.
I put the pics in an album under my name here:
Club Cobra - Bernica's Album: CSX 4000 Series Brake Upgrade
Everybody stay safe!!