@ Xcudame. I apologize for not knowing what car you are switching from drum brakes to disc brakes. I assume a Cuda. Is it a restoration or are you building it how you want it? I converted a Challenger to front disc brakes from drums over 20 years ago before there were conversion kits - just wrecking yard parts. Yes, it was a significant improvement. The car belongs to my son who was able to drive it his senior year in high school in 2005. I considered years ago swapping my 71 Challenger convertible (which I've owned since 1972 and have driven it cross country 3 times) from its stock 11-inch brakes on all 4 corners to disc brakes but since it's an original numbers matching shaker convertible, it was strongly suggested that I not change it. It's driven only to local shows, less than 25 miles. I'm with you in that I think disc brakes are the way to go. Enjoy.
Terry W.