Torsion Bars... Best Diameter for a Lowered Street / Autocross car?

Been a while sense I chimed in here... mainly b/c my shop was destroyed in a Derecho (land hurricane) in summer 2020 that put everything on hold. My Demon is in storage... but the new shop (2x biggee!!) is built and should be fully finished in about 1mo or so. Anyway... it will be a while before I can comment to how my TB choice handles, but sure am looking forward to it. Hopefully the 2nd half of 2021 will be productive and I can have the car on the road sometime in 2022! @72bluNblu ... look forward to some future questions on wheel/tire combos from me. You seem to have that all figured out. Ha!