Cobra Rear Control ARms

[pzazz03]

Hi, I recently purchased a Midstates Cobra from a third party. Before I did any serious driving in it, I got under the car to see if everything was in order. In the rear, I noticed that I have a 4 control arm set up on a Ford 9 inch differential. On the driver's side, I can move the upper and lower control arms easily. They are of the single ball type. On the passender side, both the upper and lower control arms are hard to move -- It can be done but only with the help of a wrench.
My question is, how tight should they be? Should I tighten the driver's side bars or loosen the passenger side bars a bit? Or, is this normal? Thanks -- Pzazz

[Excaliber]

Looser is better when it comes to supsension movement and pivot points.

I wonder if some WD-40 might help on the tight side?

Ernie