quick question about upper control arms

This too has been a task. I did not reaize they were installed. I had only one out of the 4
uca bushings. I kept pressing it and when it did not budge I used a micrometer and saw that it was a sleeve. The problem is that I am putting power disc brakes from a 69 cuda donor car on a 69 dart convertible. The question is if I decide to use it should i put sleeves on all 4 bushings? If so where can I buy them?
Thanks in advance