My 2001 motorhome has leaned to the right since day one. No problems, no unusual tire wear, tracks dead-on straight, everything seems just fine. I was told the reason(s) was the kitchen and all that weight are on the passenger side.
I was told that is a common "problem" with the Ford F-53 frame as far as motorhomes go. I put new Bilstiens on it about 5 years ago...no change in the lean.
Fixes: Extra leaf spring. Air bags. As for me, with no problems....I choose to simply leave it alone. BTW...the lean measures about 1.5 inches. Why worry?
Just my opinons...FWIW