Will new torsion bars correct that POS, bucket-o-bolts feel I have?

Thanks.

Car is stock height.
Visual inspections are good, since I did the work myself, I know what to look for. Nothing obvious anyway.
KYB's being suspect sounds odd to me. If I swap them out, should I swap them back once I get 1" T-Bars.
I would like to have it re-aligned once I put in TBars. What do I tell them?

KYB's are notoriously stiff. Coupled with really soft, tired torsion bars you have a total mismatch between wheel rate and shock rate. It might not be your problem, but it isn't helping. I wouldn't swap them back in regardless, unless you enjoy a really harsh ride quality. Also, take a look and see if you can see any marks to indicate that your lower control arm bumpers are hitting the frame (shiny spot). Even at stock ride height, the stock torsion bars can bottom out, especially if they're worn out.

As for the alignment, just tell "them" that you want -.5* camber, +3* caster, and between 1/8" and 1/16" toe in. "They" will probably have no idea how to set that toe setting though, so you'll probably have to tell them .07* to .14* toe in for each side, or about .14* to .28* total toe in.

Unfortunately, most chain wheel shops will not set a custom alignment. You can kinda cheat, if "they" let you, and tell them to plug in a 2009 Mustang. That setting will call for -.75* camber, +7.1* caster, and .10 to .20 degrees toe in. Of course, "they" won't be able to get that much caster, but you can just tell them to get as close as they can as long as its equal. Sometimes that works better than trying to get them to do a custom spec.

I typically just rough in the alignment myself, then have it checked at the local shop. Usually I'm close enough that they'll tweak it for me to even things up without charging me for a full alignment. But I start off by saying that not one single part of my suspension is stock, and that setting the stock factory alignment would probably kill me. It helps that I have 17 or 18" rims on my cars with 275 or bigger tires and all kinds of tubular and adjustable components.