What if the right rear leaf was raising that corner which would make the left front look lower, or right rear had sagged more than left rear.
Im sure circle track folks tune their cars this way.
I bet you could install a lowering block on the left rear to raise that side which would pick up the front too.
I looked through all the pics and the rear seems fine.
So did you measure the height when you were looking at it?
Just realized this is two pages about a truck that the OP hasn't seen in person.
I'll be more careful next time.
