This is one I am sure the GCR scholars will pounce on but here goes.

My reading (paraphrase) of the GCR says that bushings can be replaced and solid bushings and spherical bushings may be used provided they provide NO other function other than that of the bushing. If that is the case, here is my question:

Can I replace the rear lower control arm bushings, inner and outer, with spherical bushings?

Of course, it would follow that I could do the same in the front as well but it is still assembled right now.

And the real question: Is it going to make that much of a difference over poly bushings? My gut says no and poly, even with replacement issues, wear etc, there will not be a significant (yeah that's loaded) performance change in the car.

I have enough control arms on hand that I could do both but the labor would be a killer.

Thoughts?