I am planning on doing the Cadillac ATS "brembo" caliper conversion. I was wondering if I need to upgrade or swap out the master cylinder/brake booster on my 94 GT to a 96-98 cobra or 03-04 to support going from a 1 piston to a 4 piston caliper. Is there a difference between the cobra master cylinders/brake boosters vs non cobras, specifically for 94/95?