This is a very open ended question/discussion the way its being presented. Your overall build and goals/intent would greatly add to the discussion.
If you're going as far as to remove the inner fenders, and tie the front end into the chassis, with a cage...you'd be nuts to INTENTIONALLY keep torsion bars
IMO.
As i'm guessing this won't be a complete tube chassis pro mod with a tilt front end....i'm thinking a HDK or Alter K, would easily help get the space you need opposed to chopping up the unibody. I'm guessing you mean an Alson cage...nota complete rolling chassis? correct? the "keeping Ma's suspension" doesn't tie into either of these rationales...So some clarification would help
