Much food for thought. This car is a one P.O. who kept it stock and basically gave it to me to keep that way. Currently I am replacing the shocks with Bilsteins all around. Entire front end is being rebuilt incl every bushing, control arm, tie rod etc. I am surprised that all is original and not in bad shape after 41 years and 112K miles. Tires remain at 14. I will give it a run and if I want more, contemplate a rear sway bar. From the readings above, strut brace adds little. Trailing arm bushings, should I change them, seems like a hassle in view of condition of other bushings I am changing that don't look bad.