'73 shifter issues

Shift has gotten almost impossible, and the shifter is loose and rattles terribly. Research suggests I just need to replace the shifter bushing? I've also seen this would be a good time to replace the coupler as well. I'm on cip1 and see the coupler kit and the shifter bushing with ring. Do I need anything else? What is this shifter box bushing I see, do I need that?
THanks in advance for the help! I've done a few basic things but I'm fairly new so any advice would be appreciated!