Motorcycle Repair: front brakes, calibers, sportster

Question
what kind of brake setup do i use on 72 xlch springer

Answer
Since they never made a springer in 72 on a sportster you are going to have to find out who the manufacture of the springer is. Then you can check with them. the other thing you can do it take some measurements on the caliber holes and then you would have to check calibers to see what will fit.
Good luck and happy riding
Mike