When I got my '84, in 1991, the bushings were squeaking.  I used silicone
spray then (stopped the squeaking) and every year since.  The bushings look
good.

I've read in the archives where more than one person has replaced the
control arm bushings only to have the new ones squeak right from the git-go.

Again, the silicone works for me.  When the bushings show their wear I'll
replace them.

Mike