Thanks for the quick response and sorry for dragging things out. I have a pair of YJ leaf springs that came from a local Jeep wrecking yard. I bought them a few months back. I planned to try them in my trailer to compare to the stiffer Procomp springs that have some lift.
I measured one of the junkyard springs and the eyelet diameter is 1.25" at one end and 1.5" at the other. Maybe shackle end versus chassis end?
It may be that all of your bushings are 1.5" diameter?