What is the advantage of the adjustable rear upper control arm as compared to the non adjustable version on a stock 1968 chevelle.


Thanks
Mike

Being able to set your pinion angle, which can help with cars suffering from wheelhop.

What is the advantage of the adjustable rear upper control arm as compared to the non adjustable version on a stock 1968 chevelle.Thanks Mike

Easy to adjust pinion angel and free up/down movement of rear-end........

Well, other than stock arms, the only "good" ones use a spherical Johnny Joint... and the only ones that use that type of bushing are Currie and Edelbrock.

Spherical Rod-End bearings are much more common (lots of mfg'rs make them with rod-ends) but they wear out rather quickly.

Avoid any upper arm with poly bushings or similar single-axis hard bushings.