I have a different in ride height left to right when measured at the middle of the car (on the main chassis where the link arms attach).
Where do I start to find the issue?

This is my first time working with pan cars. I have the same problem with my F1 and 12r5.2

I have tried rotating the battery to see if its a weight inbalance. Backed off the side Springs so they are not touching. Tyre diameter is the same.