Rear leaf spring shackle issue

Your problem starts with Mancini SS leaf springs. The passenger spring is bent opposite to the arch right before the shackle… I never trusted that so never used the set and bought Espo leaf springs. But I believe the Mancini SS springs to be made incorrectly and decided before I even attempted to install them to go another route. I bet the Eye to Eye dimension is shorter than it’s supposed to be to set you up with proper shackle angle… and therefore folding under the wrong way. I had this happen on a trailer that I built once, before I fully understood shackle angles, and since then always watch that closely and scrutinize all replacement suspension components.