I am nearly ready to do my lift.
I have to reskin the outside of my bus.
So, part of my lift is lowering the actual exterior body of the bus.
Adding a mid-beam for surface mounting of sheet metal panels.
Then measuring the different to fit two full 4 foot sheets of steel.
So far, I will be lifting roughly 14 inches.
I will cut the ribs the same height from the floor.
Roughly in the middle of where the windows used to be.
I have heard people saying staggering the cuts adds strength.
Other people say it doesn't matter.
Personally, I am going to cut the ribs at whatever level is comfortable for me.
I am confident with my welding and bolting to secure the ribs after the lift.
Do whatever you think is best. You will get a feel for it once, you get closer. My plans have changed about a hundred times since, I bought my bus and started actually ripping it apart.
Good luck, hope it goes well.
D.L. Jones III