I couldn't get my tie rods off. So to switch the front bar I dropped the back half of the subframe and slid it out towards the back. And despite not unbolting the frame completely I was told I should still get an alignment after doing that.

Okay...

One admin says to do just the rear.

One admin says to do both, not just the rear.

:?

Can we get a third Admin to chip in his two cents as a tiebreaker?

Has anyone ever actually tried just a rear sway upgrade? In theory, it would make the car less prone to understeer while providing some additional roll stiffnesss.

yes a member had FE2 Springs on the front with the larger sways, and the FE1 in he back with the Larger sways....as for a outcome....i personally wouldnt do it

yeah a the rear makes a big difference. Do both, you wont notice all that much with just the front.

Correction. One MODERATOR said one thing, an Admin said another.

Admin>Moderator. No tie-breaker needed.

An FE1 setup will never feel as firm and tight as an FE2 if you leave a component out.

Well, that'* not really the situation that I'd be looking at. He mixed different springs, while using matching sways. I'd be doing the opposite: Using all matching FE1 springs, but using only the thicker sway in the rear. Apples to oranges, I think.
Oops... My mistake, Sir.

I assume you know, but I'll repeat it just to make sure: I'm not looking to do springs at this time, just sways. I want to keep it Buick soft on the highway, but not Buick scary in the corners.

sorry i amswerd too much of your question.....you will sitll have balance issues with a bigger rear bar only