My 1969 firebird sounds like a hay wagon over bumps and dips and i found the upper Control arm bushing are the issue.. My question is should i try a complete new replacement control arm since ill be taking it apart anyways..And that way i will get a new ball joint.. Reason i ask is i see some stock style at a good price... Here is a link to one. https://restorationpartssource.com/store/upper-control-arm-1967-69-firebird-ls-dynacorn-details.html
I followed your link and I have to say if I were going to have the upper control arms off anyway, I would take advantage of this low price to get everything new