Disc ideas

My car has the factory installed A-body 8 3/4" with a 3.23:1 sure-grip (5 on 4" small bolt pattern) with 14" X 5 1/2" Rallye wheels (front and rear). So, I used the SSBC kit. Pricey? Yes! Complete? Yes! Would I use them again? Yes!
You have the same ralley son your Dart. Wanting to go to wider rear tires. Found similar rims in 14x8 at summit. Thanks for the brake info.