Torque box question

I8NEMO said
I welded in sub frame connectors years ago, car was level and on jacks. Of course, THEN I bought a rotisserie lol. Once this car is disassembled again it'll go back on the twirler for mods at the spare tire well for new valance exit exhaust route. I will be installing torque boxes too. Common sense tells me not to do the torque boxes on the rotisserie. but with frame connectors in, I'm thinking deflection would be at a minimum? Does anyone have any stiffening data or specs on post frame connector chassis? Sure would be nice to weld upright if possible.
Thanks,
Tim

I like doing chassis mods like that with the car assembled and with the weight on the suspension. That's how they spend their lives anyway. Opinions vary, but that's mine and it's worked well for me. I just get the car up on stands as HIGH as possible under the axle housing in the rear and under the lower control arms in the front.