Frame connectors..

Want to do frame connectors and front lower core support..my car looks like it has torque boxes..was that something that some had?? Then looking at inner fender braces while I'm having my floor pan fixed and any issues with frame repaired..have shocks..tbars ..leafs .sway bars.on way also..
Did some research and found 1.5*3 is the way to go a seems pretty straight forward..