I just put those bars on my FXR4. I put on forward controls so the drag bars couldn't stay. I wanted Wild Ones drag bars, but then I needed to relocate the indicator lights.
I installed 56082-83T bars, still in P& A catalog, $70 (55) retail. I bought a set of 4 1/2" Standard pullback risers $25. The top riser piece with the lights goes right on top.
All the original brake lines, cables, harness worked fine. The brake line was the only item that needed a little coercion. I loosened the banjo bolt at the master in turned it straight down and also bent the solid part of the brake line at the lower tree up. All worked out well. The only difficult part was removing the left side grip so as to re use it.
The combination of risers and bars move the reach back about 4" which was perfect. A low cost solution. In a few years, I'll go to Wild Ones and change the cables, etc and relocate the lights.