I had a 71 Dart Swinger that the previous owner converted to the 73 and up discs. It was a manual brake car and stopped on a dime. No complaints at all for a setup based off factory parts. If you get the right parts it should be all good.

I ended up with a 70 Malibu 350 after that with 4 wheel power drum brakes and missed the brakes on the Dart right away. Had to adjust my driving and give myself more distance to stop as that Chevelle had horrible brakes in comparison.