Disc brake conversion recommendations

Just wondering who's using what to convert from front drum to power disc. Good experience? bad experience? 2 inch drop spindles? Or should I just find the factory stuff and maybe use a dual power booster just to save some room under the hood? This is for a 69 Dart

I went with Viper brakes on my Duster.
DSC_3985 (Large).JPG DSC_3613 (Large).JPG