It appears one of the previous owners of my TJ installed spring spacers:

I have next to no knowledge about lifting vehicles, and I have no idea whether or not the person who installed these spacers knew what they were doing. What potential problem areas do I need to double check to verify the integrity of this lift?

I have next to no knowledge about lifting vehicles, and I have no idea whether or not the person who installed these spacers knew what they were doing. What potential problem areas do I need to double check to verify the integrity of this lift?