What did you do for chassis stiffening?

Firm feel front tubular sway bar 1 /8" and their tubular upper control arms. That coupled with the frame connectors, inner fender supports, and torque boxes from US Car Tool have made my Cuda handle like a dream. I also have the firm feel stage 3 power steering gear box. Had the car for 36yrs and it's a blast to drive now. Little sway around bends and such. Couple that with the hydro boost braking system and I'm in heaven.