69 dart disc brakes

I have a 69 dodge dart swinger 340 front disc brakes sbp wanting to change to lbp im wondering if the stock disc spindle will work on the new lbp set up I have the 73 upper control arm and large ball joint. I sure someone has ask this same question. Will my stock lower control arm work with the lbp im sure if this will work, never done a sbp/lbp before wanting to know what parts will work and what I need to buy.