Yes I installed them on my '86 and I think they helped nicely.
I used to run 15W oil with Progressive springs and billet fork brace, no lowering or anything like that. Going from 10W to 15W oil had very little effect for me, and the front was always so twitchy over ever small bump, lane changes etc.
Now I run the Intimators with 5W oil, same everything else, and it feels MUCH better. I do have an extra 15mm of preload on the springs because of the intimators' height and the fact that I didn't shave 15mm off the spacers above the springs, but it definitely feels better going over bumps etc, more like a normal bike than a Max for sure. It seems to be happier / more solid around turns as well, doesn't get upset as quickly as before. Also bear in mind that I renewed my head bearings late last year.
I haven't ridden it extensively enough yet to really make a fair comparison, but for the little I did, I definitely noticed an improvement and think it was $150 very well spent.