I threw a set from Firmfeel on my '68 Barracuda along with some other goodies. The car tracks straighter down the highway without that vague wandering feeling, which can largely be attributed to having more positive caster.
The Hotchkis tubular upper control arms come with an additional bracket to relocate one of the control arm bushings. I understand it changes/improves the geometry and reduces bumpsteer. Haven't tried those, and they are proud of them.