F bodies

Firmfeel Mopar Suspension and Steering

FF has new stiffer torsion bars with higher spring rates.
WHOA! That's new!
Depends on the attachment points for the hitch. Unibody vehicles don't make great tow rigs.

If you're talking about the ones on the k-frame, toss that trash and replace with aluminum biscuits. Ditto the iso-bushing trash on the rear axle. I do believe Firm Feel offers both solutions to problems that didn't need solving.
I recall the F-bodies were rated to tow 3 tons properly equipped. (360, 727, tow package, HD cooling.)