Disc brake conversion (70 Dart)

Viper Caliper Mounting Brackets for Mopar DRUM Knuckles

That's another great option to upgrade too if you have good drum spindles. Use the D100 rotors and buy the Dr. Diff Viper/Brembo adapter kits, it's affordable enough. Just look around for a set of 1st Gen Viper 4 piston Brembo calipers. They are all over Ebay and Viper owners love to pull them off and upgrade leaving us perfectly good usable caliper cores. Every once in a while there are rebuilt cores at autopart stores.