When I did my conversion, I used the original control arms and lower bushings. I just had to drill out the lower bushings to adapt to the K & H disc brake spindles. I used all the stock hardware. Been working fine for years. The 69 Dart did have stock 4-wheel power 10" drums to start with and I even used the same M/S and no PP valve (I do not drive it in the rain, so no spin-out). See car in photo.
