Your T'bird isn't going to handle like your 'Vette. Adding the HD sway bar and a rear bar will help a lot, but it's still a luxury car, not a sports car.
I rebuilt my front end with the kit from Kanter, which is reasonably priced but in hindsight I'm not sure the quality is the best. Doing it again (which I hopefully won't), I'm not sure I'd use that kit.
After the rebuild, my car has a much more controlled ride but still floats quite a bit and leans in corners. I don't have the rear bar nor the HD front, however.
DGS (aka salguod)
1960 Convertible - Raven Black, Red leather