Front End Lowering

I will admit I am totally unfamiliar with the funky (to me) torsion bar set up that the Imperial/J-body has. Worked on many B-bodies and done my fair share of cutting front springs and/or installing lowering spring.
How does someone lower the J-body design (if it's possible)?
I don't want anything drastic. Just an inch or so.

TIA
Author: Norse