I don't know about Daystar but the Energy Suspension were within a fraction of the factory mounts, front body mount needed to have a lip removed on one of the sides top/bottom but I cant remember off the top of my head but it was easy to just sand it off. I also had to grab some thicker washers and bolts as my factory washers were badly rusted and I didn't want to reuse.
I believe there are some variations between the early years and later, on the body mounts. I had a small problem with mine from Roger Brown ( 4crawler ), but made it work, like JMack and sanded some down. My project came with FJ 60 mounts, I think, but didn't use them.