Ah, I see what you are doing, and it makes sense if you want to shift your axle.
I did the lift on my Trailmanor with the factory lift kit, so it is doable by a shade tree mechanic like me.
Like Joseph said, mark the current location of the axle......maybe a white marker with a tri-square ??
If you are just planning on moving the axle on the right side, I think I would do a measurement from the tongue coupler to a point on each axle (hub??) to see if the current axle is square with the tongue before starting the project. It is possible that the axle is not square with the frame now, and just the right side needs to be moved, or the body is slightly off kilter, giving the impression it is the axle.
An impact wrench will probably be needed to remove the old bolts, and a torque wrench for the new bolts. Can't remember what I torqued mine to.
I might be a little hard getting a wench into the tubing for tightening purposes.
Good Luck on the project.