Watt's Link question
 

A lot of F-bodies sit roughly 1/2 - 3/4" lower in the passenger side rear compared to the driver side rear. Would a Watt's Link correct this condition?

No. You can fix it with coilovers or spacers, I wouldn't worry about it though.

I tried a ~1/2" spacer on the lower side and it didn't work -- the lower side still stayed lower by about the same amount. I suspect this is due to the panhard setup / geometry, but have not confirmed this.

For what it's worth I also tried swapping springs from one side to the other and that did not help either.

Did you loosen all the bolts on the bushings of your LCAs, PHB, etc... when you installed the spacer to make sure there wasn't any bind on the rubber bushings?

As far as swapping springs, it's typically more of a unibody issue which you can "fix" by running a taller spring on one side than the other. Have you measured the heights with and without a driver in the seat?

Thanks for that advice. I will plan to loosen everything you mentioned and retighten with the suspension loaded and car level.

I think I could test my theory by loosening the PBH alone.

No, lateral locating decices (PHB, watts link) have absolutely zero effect on ride height.

I feel like it's the axle mounting points if anything, not the chassis mounting points. If the axle perches are not perfectly strait up and down this can bend the spring and cause differences in ride height.

This. You can take the panhard bar completely off the car and it will still sit the same. The ride height variation is one of the mysteries of these cars. Many of them do it, and noone has been able to find a good reason why. Watts link/PHB will just fix rear end centering variations caused by ride height differences, but won't do anything for the ride height

I haven't heard that explanation for this issue before, but the f-body lean is just weirdness. I should have measured mine with the stock shocks and springs when I swapped my axle assembly. But the short answer to the OP is still the same, and I think really the only way to make it even would be to do coilovers and make one way longer than the other, not sure how that would ride though.

Orientation of the rear spring pigtail can have an effect on ride height.

Front spring symmetry can also affect ride height. It's a pain, but if you swap the fronts you can decide if one of the springs is sagging.

ramey

True. Happens with trucks all the time