Bad Lean

I just installed a 2" susp lift on the CJ5 and still have a fairly bad lean on the rear driver side, about an inch to inch and a half. It was leaning before the lift but I just figured it was because of the old wore out springs. Any ideas as to what the heck it could be. Could the frame be bad at the ends where the shackles bolt up? It doesn't seem like the frame is bent. I just recently repaired the ends of the frame by boxing them in. Actually I sleeved them with 1/4" wall square tube. I am at a loss here. I know some have problems with older Jeeps leaning one way or another but this seems like quite a bit of difference. Thanks in advance for any insight.